Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒          QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2025

or

☐          TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from    to

Commission File Number: 1-33409

T-MOBILE US, INC.

(Exact name of registrant as specified in its charter)

Delaware	20-0836269
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

12920 SE 38th Street

Bellevue, Washington

(Address of principal executive offices)

98006-1350

(Zip Code)

(425)	378-4000
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
Title of each class	Trading Symbol(s)	Name of each exchange on which registered
---	---	---
Common Stock, par value $0.00001 per share	TMUS	The NASDAQ Stock Market LLC
3.550% Senior Notes due 2029	TMUS29	The NASDAQ Stock Market LLC
3.700% Senior Notes due 2032	TMUS32	The NASDAQ Stock Market LLC
3.150% Senior Notes due 2032	TMUS32A	The NASDAQ Stock Market LLC
3.850% Senior Notes due 2036	TMUS36	The NASDAQ Stock Market LLC
3.500% Senior Notes due 2037	TMUS37	The NASDAQ Stock Market LLC
3.800% Senior Notes due 2045	TMUS45	The NASDAQ Stock Market LLC

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).      Yes ☐ No ☒

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	Shares Outstanding as of April 17, 2025
Common Stock, par value $0.00001 per share	1,135,445,108

T-Mobile US, Inc.

Form 10-Q

For the Quarter Ended March 31, 2025

Table of Contents

PART I. FINANCIAL INFORMATION
	Item 1.	Financial Statements	3
		Condensed Consolidated Balance Sheets	3
		Condensed Consolidated Statements of Comprehensive Income	4
		Condensed Consolidated Statements of Cash Flows	5
		Condensed Consolidated Statement of Stockholders’ Equity	6
		Notes to the Condensed Consolidated Financial Statements	8
	Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	32
	Item 3.	Quantitative and Qualitative Disclosures About Market Risk	52
	Item 4.	Controls and Procedures	52
PART II. OTHER INFORMATION
	Item 1.	Legal Proceedings	53
	Item 1A.	Risk Factors	53
	Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	55
	Item 3.	Defaults Upon Senior Securities	55
	Item 4.	Mine Safety Disclosures	55
	Item 5.	Other Information	55
	Item 6.	Exhibits	56
		Signatures	58

Index for Notes to the Condensed Consolidated Financial Statements

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

T-Mobile US, Inc.

Condensed Consolidated Balance Sheets

(Unaudited)

(in millions, except share and per share amounts)	March 31,<br>2025		December 31,<br>2024
Assets
Current assets
Cash and cash equivalents	$	12,003	$	5,409
Accounts receivable, net of allowance for credit losses of $175 and $176	4,392		4,276
Equipment installment plan receivables, net of allowance for credit losses and imputed discount of $647 and $656	4,294		4,379
Inventory	1,937		1,607
Prepaid expenses	980		880
Other current assets	3,835		1,853
Total current assets	27,441		18,404
Property and equipment, net	37,897		38,533
Operating lease right-of-use assets	25,025		25,398
Financing lease right-of-use assets	2,977		3,091
Goodwill	13,467		13,005
Spectrum licenses	98,733		100,558
Other intangible assets, net	2,618		2,512
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount of $161 and $158	2,111		2,209
Other assets	4,364		4,325
Total assets	$	214,633	$	208,035
Liabilities and Stockholders' Equity
Current liabilities
Accounts payable and accrued liabilities	$	7,900	$	8,463
Short-term debt	8,214		4,068
Deferred revenue	1,193		1,222
Short-term operating lease liabilities	3,305		3,281
Short-term financing lease liabilities	1,136		1,175
Other current liabilities	1,881		1,965
Total current liabilities	23,629		20,174
Long-term debt	76,033		72,700
Long-term debt to affiliates	1,497		1,497
Tower obligations	3,634		3,664
Deferred tax liabilities	17,505		16,700
Operating lease liabilities	25,974		26,408
Financing lease liabilities	1,117		1,151
Other long-term liabilities	4,139		4,000
Total long-term liabilities	129,899		126,120
Commitments and contingencies (Note 14)
Stockholders' equity
Common stock, par value $0.00001 per share, 2,000,000,000 shares authorized; 1,273,937,732 and 1,271,074,364 shares issued, 1,137,339,578 and 1,144,579,681 shares outstanding	—		—
Additional paid-in capital	68,837		68,798
Treasury stock, at cost, 136,598,154 and 126,494,683 shares	(23,085)		(20,584)
Accumulated other comprehensive loss	(989)		(857)
Retained earnings	16,342		14,384
Total stockholders' equity	61,105		61,741
Total liabilities and stockholders' equity	$	214,633	$	208,035

The accompanying notes are an integral part of these condensed consolidated financial statements.

Index for Notes to the Condensed Consolidated Financial Statements

T-Mobile US, Inc.

Condensed Consolidated Statements of Comprehensive Income

(Unaudited)

	Three Months Ended March 31,
(in millions, except share and per share amounts)	2025		2024
Revenues
Postpaid revenues	$	13,594	$	12,631
Prepaid revenues	2,643		2,403
Wholesale and other service revenues	688		1,062
Total service revenues	16,925		16,096
Equipment revenues	3,704		3,251
Other revenues	257		247
Total revenues	20,886		19,594
Operating expenses
Cost of services, exclusive of depreciation and amortization shown separately below	2,602		2,688
Cost of equipment sales, exclusive of depreciation and amortization shown separately below	4,798		4,399
Selling, general and administrative	5,488		5,138
Depreciation and amortization	3,198		3,371
Total operating expenses	16,086		15,596
Operating income	4,800		3,998
Other expense, net
Interest expense, net	(916)		(880)
Other (expense) income, net	(46)		20
Total other expense, net	(962)		(860)
Income before income taxes	3,838		3,138
Income tax expense	(885)		(764)
Net income	$	2,953	$	2,374
Net income	$	2,953	$	2,374
Other comprehensive (loss) income, net of tax
Reclassification of loss from cash flow hedges, net of tax effect of $16 and $15	46		43
Losses on fair value hedges, net of tax effect of $(61) and $0	(177)		—
Amortization of actuarial gain, net of tax effect of $0 and $(2)	(1)		(5)
Other comprehensive (loss) income	(132)		38
Total comprehensive income	$	2,821	$	2,412
Earnings per share
Basic	$	2.59	$	2.00
Diluted	$	2.58	$	2.00
Weighted-average shares outstanding
Basic	1,140,537,935		1,185,298,497
Diluted	1,144,655,297		1,189,092,019

The accompanying notes are an integral part of these condensed consolidated financial statements.

Index for Notes to the Condensed Consolidated Financial Statements

T-Mobile US, Inc.

Condensed Consolidated Statements of Cash Flows

(Unaudited)

	Three Months Ended March 31,
(in millions)	2025		2024
Operating activities
Net income	$	2,953	$	2,374
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	3,198		3,371
Stock-based compensation expense	186		140
Deferred income tax expense	771		715
Bad debt expense	323		282
Losses from sales of receivables	22		21
Changes in operating assets and liabilities
Accounts receivable	(93)		(416)
Equipment installment plan receivables	24		277
Inventory	(318)		170
Operating lease right-of-use assets	855		856
Other current and long-term assets	10		160
Accounts payable and accrued liabilities	(268)		(1,734)
Short- and long-term operating lease liabilities	(898)		(1,017)
Other current and long-term liabilities	(88)		(172)
Other, net	170		57
Net cash provided by operating activities	6,847		5,084
Investing activities
Purchases of property and equipment, including capitalized interest of $(10) and $(9)	(2,451)		(2,627)
Purchases of spectrum licenses and other intangible assets, including deposits	(73)		(61)
Proceeds related to beneficial interests in securitization transactions	—		890
Acquisition of companies, net of cash acquired	(727)		—
Other, net	(158)		11
Net cash used in investing activities	(3,409)		(1,787)
Financing activities
Proceeds from issuance of long-term debt	7,774		3,473
Repayments of financing lease obligations	(315)		(327)
Repayments of long-term debt	(479)		(223)
Repurchases of common stock	(2,494)		(3,594)
Dividends on common stock	(1,003)		(769)
Tax withholdings on share-based awards	(272)		(192)
Other, net	(18)		(34)
Net cash provided by (used in) financing activities	3,193		(1,666)
Change in cash and cash equivalents, including restricted cash	6,631		1,631
Cash and cash equivalents, including restricted cash
Beginning of period	5,713		5,307
End of period	$	12,344	$	6,938

The accompanying notes are an integral part of these condensed consolidated financial statements.

Index for Notes to the Condensed Consolidated Financial Statements

T-Mobile US, Inc.

Condensed Consolidated Statement of Stockholders’ Equity

(Unaudited)

(in millions, except share and per share amounts)	Common Stock Outstanding	Treasury Stock Outstanding	Treasury Shares at Cost		Par Value and Additional Paid-in Capital		Accumulated Other Comprehensive Loss		Retained Earnings		Total Stockholders' Equity
Balance as of December 31, 2024	1,144,579,681	126,494,683	$	(20,584)	$	68,798	$	(857)	$	14,384	$	61,741
Net income	—	—	—		—		—		2,953		2,953
Dividends declared ($0.88 per share)	—	—	—		—		—		(995)		(995)
Other comprehensive loss	—	—	—		—		(132)		—		(132)
Stock-based compensation	—	—	—		177		—		—		177
Stock issued for employee stock purchase plan	712,672	—	—		125		—		—		125
Issuance of vested restricted stock units	3,105,719	—	—		—		—		—		—
Shares withheld related to net share settlement of stock awards and stock options	(1,008,606)	—	—		(273)		—		—		(273)
Repurchases of common stock	(10,091,227)	10,091,227	(2,495)		—		—		—		(2,495)
Other, net	41,339	12,244	(6)		10		—		—		4
Balance as of March 31, 2025	1,137,339,578	136,598,154	$	(23,085)	$	68,837	$	(989)	$	16,342	$	61,105
Balance as of December 31, 2023	1,195,807,331	67,096,823	$	(9,373)	$	67,705	$	(964)	$	7,347	$	64,715
Net income	—	—	—		—		—		2,374		2,374
Dividends declared ($1.30 per share)	—	—	—		—		—		(1,525)		(1,525)
Other comprehensive income	—	—	—		—		38		—		38
Stock-based compensation	—	—	—		152		—		—		152
Stock issued for employee stock purchase plan	950,082	—	—		112		—		—		112
Issuance of vested restricted stock units	3,525,790	—	—		—		—		—		—
Shares withheld related to net share settlement of stock awards and stock options	(1,171,055)	—	—		(192)		—		—		(192)
Repurchases of common stock	(21,933,790)	21,933,790	(3,604)		—		—		—		(3,604)
Other, net	61,752	23,309	(5)		9		—		—		4
Balance as of March 31, 2024	1,177,240,110	89,053,922	$	(12,982)	$	67,786	$	(926)	$	8,196	$	62,074

The accompanying notes are an integral part of these condensed consolidated financial statements.

Index for Notes to the Condensed Consolidated Financial Statements

T-Mobile US, Inc.

Index for Notes to the Condensed Consolidated Financial Statements

Note 1	Summary of Significant Accounting Policies	8
Note 2	Business Combinations	9
Note 3	Joint Ventures	11
Note 4	Receivables andRelated Allowance for Credit Losses	12
Note 5	Sales of Certain Receivables	14
Note 6	Goodwill, Spectrum License Transactions and Other Intangible Assets	15
Note 7	Fair Value Measurements	18
Note 8	Debt	20
Note 9	Tower Obligations	22
Note 10	Revenue from Contracts with Customers	23
Note 11	Segment Reporting	25
Note 12	Stockholder Return Program	25
Note 13	Earnings Per Share	26
Note 14	Commitments and Contingencies	27
Note 15	Additional Financial Information	30
Note 16	Subsequent Events	31

Index for Notes to the Condensed Consolidated Financial Statements

T-Mobile US, Inc.

Notes to the Condensed Consolidated Financial Statements

Note 1 – Summary of Significant Accounting Policies

Basis of Presentation

The unaudited condensed consolidated financial statements of T-Mobile US, Inc. (“T-Mobile,” “we,” “our,” “us” or the “Company”) include all adjustments of a normal recurring nature necessary for the fair presentation of the results for the interim periods presented. The results for the interim periods are not necessarily indicative of those for the full year. The condensed consolidated financial statements should be read in conjunction with our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2024.

The condensed consolidated financial statements include the balances and results of operations of T-Mobile and our consolidated subsidiaries. We consolidate majority-owned subsidiaries over which we exercise control, variable interest entities (“VIEs”) for which we are deemed to be the primary beneficiary and VIEs which cannot be deconsolidated, such as those related to our tower obligations as discussed in Note 9 - Tower Obligations. Intercompany transactions and balances have been eliminated in consolidation.

The preparation of financial statements in conformity with United States (“U.S.”) generally accepted accounting principles (“GAAP”) requires our management to make estimates and assumptions that affect the financial statements and accompanying notes. Estimates are based on historical experience, where applicable, and other assumptions that management believes are reasonable under the circumstances. Estimates are inherently subject to judgment and actual results could differ from those estimates.

Accounting Pronouncements Not Yet Adopted

Income Tax Disclosures

In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The standard enhances income tax disclosure requirements for all entities by requiring specified categories and greater disaggregation within the rate reconciliation table, disclosure of income taxes paid by jurisdiction, and providing clarification on uncertain tax positions and related financial statement impacts. The standard will be effective for us for our fiscal year 2025 annual financial statements with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2025 annual financial statements, and we expect the adoption of the standard will impact certain of our income tax disclosures.

Disaggregation of Income Statement Expenses

In November 2024, the FASB issued ASU 2024-03, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” In January 2025, the FASB issued ASU 2025-01, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date,” which clarifies the effective date of ASU 2024-03. The standard requires that public business entities disclose additional information about specific expense categories in the notes to financial statements for interim and annual reporting periods. The standard will become effective for us for our fiscal year 2027 annual financial statements and interim financial statements thereafter and may be applied prospectively to periods after the adoption date or retrospectively for all prior periods presented in the financial statements, with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2027 annual financial statements, and we are currently evaluating the impact this guidance will have on the disclosures included in the Notes to the Consolidated Financial Statements.

Index for Notes to the Condensed Consolidated Financial Statements

Note 2 – Business Combinations

Acquisition of Ka’ena Corporation

On March 9, 2023, we entered into a merger and unit purchase agreement (the “Merger and Unit Purchase Agreement”) for the acquisition of 100% of the outstanding equity of Ka’ena Corporation and its subsidiaries, including, among others, Mint Mobile LLC (collectively, “Ka’ena”), for a maximum purchase price of $1.35 billion to be paid out 39% in cash and 61% in shares of T-Mobile common stock (the “Ka’ena Acquisition”). On March 13, 2024, we entered into Amendment No. 1 to the Merger and Unit Purchase Agreement, which amended, among other things, certain mechanics of the payment of the purchase consideration for the Ka’ena Acquisition, which resulted in a nominal increase in the percentage of cash compared to shares of T-Mobile common stock to be paid out as part of the total purchase price.

Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on May 1, 2024 (the “Ka’ena Acquisition Date”), we completed the Ka’ena Acquisition, and as a result, Ka’ena became a wholly owned subsidiary of T-Mobile. Concurrently and as agreed upon through the Merger and Unit Purchase Agreement, T-Mobile and Ka’ena entered into certain separate transactions, including the effective settlement of the preexisting wholesale arrangement between T-Mobile and Ka’ena and agreements with certain of the sellers to provide services to T-Mobile during the post-acquisition period.

In accordance with the terms of the Merger and Unit Purchase Agreement, the total purchase price is variable, dependent upon specified performance indicators of Ka’ena, and consists of an upfront payment on the Ka’ena Acquisition Date and an earnout payable on August 1, 2026.

As of March 31, 2025, $210 million of liabilities for contingent consideration and $106 million of liabilities for post-acquisition services were presented within Other long-term liabilities on our Condensed Consolidated Balance Sheets.

Fair Value of Assets Acquired and Liabilities Assumed

We have accounted for the Ka’ena Acquisition as a business combination. The identifiable assets acquired and liabilities assumed from Ka’ena were recorded at their provisionally assigned fair values as of the Ka’ena Acquisition Date and consolidated with those of T-Mobile.

During the three months ended March 31, 2025, the provisionally assigned fair values of Other long-term liabilities and Deferred tax liabilities increased $9 million and decreased $3 million, respectively, with an offsetting net increase to Goodwill, based on additional information arising subsequent to the initial valuation. These measurement period adjustments did not have an impact on our Condensed Consolidated Statements of Comprehensive Income for the three months ended March 31, 2025.

Goodwill

Goodwill with a provisionally assigned value of $777 million represents the excess of the consideration transferred over the fair values of assets acquired and liabilities assumed. The provisionally assigned goodwill recognized includes expected growth in customers and service revenues to be achieved from the operations of the combined company, the assembled workforce of Ka’ena and intangible assets that do not qualify for separate recognition. Of the total provisionally assigned amount of goodwill resulting from the Ka’ena Acquisition of $777 million, the preliminary amount deductible for tax purposes is $121 million. All of the goodwill acquired is allocated to the Wireless reporting unit.

Acquisition of UScellular Wireless Operations

On May 24, 2024, we entered into a securities purchase agreement with United States Cellular Corporation (“UScellular”), Telephone and Data Systems, Inc., and USCC Wireless Holdings, LLC, pursuant to which, among other things, we will acquire substantially all of UScellular’s wireless operations and select AWS, PCS, 600 MHz, 700 MHz and other spectrum assets for an aggregate purchase price of approximately $4.4 billion, payable in cash and the assumption of up to $2.0 billion of debt through an exchange offer to certain UScellular debtholders prior to closing. To the extent any debtholders do not participate in the exchange, their bonds will continue as obligations of UScellular, and the cash portion of the purchase price will be correspondingly increased. The transaction is expected to close in mid-2025, subject to customary closing conditions and receipt of certain regulatory approvals. Upon closing of the transaction, we expect to account for the UScellular transaction as a business combination and to consolidate the acquired operations.

Index for Notes to the Condensed Consolidated Financial Statements

Following the closing of the transaction, UScellular will retain ownership of its other spectrum, as well as its towers. Subject to the closing of the transaction, we will enter into a 15-year master license agreement to lease space on at least 2,100 towers being retained and to extend our tenancy term on approximately 600 towers where we are already leasing space from UScellular for 15 years post-closing. We estimate the incremental future minimum lease payments associated with the master license agreement will be $1.4 billion over 15 years post-closing.

Acquisition of Vistar Media Inc.

On December 20, 2024, we entered into an agreement and plan of merger for the acquisition of 100% of the outstanding capital stock of Vistar Media Inc. (“Vistar”), a provider of technology solutions for digital-out-of-home advertisements (the “Vistar Acquisition”).

Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on February 3, 2025 (the “Vistar Acquisition Date”), we completed the Vistar Acquisition, and as a result, Vistar became a wholly owned subsidiary of T-Mobile. In exchange, T-Mobile transferred cash of $621 million. A portion of the payment made on the Vistar Acquisition Date was for the settlement of preexisting relationships with Vistar and is excluded from the fair value of consideration transferred.

The financial results of Vistar from the Vistar Acquisition Date through March 31, 2025, were not material to our Condensed Consolidated Statements of Comprehensive Income, nor were they material to our prior period consolidated results on a pro forma basis. Costs related to the Vistar Acquisition were not material to our Condensed Consolidated Statements of Comprehensive Income.

Fair Value of Assets Acquired and Liabilities Assumed

We have accounted for the Vistar Acquisition as a business combination. The identifiable assets acquired and liabilities assumed from Vistar were recorded at their provisionally assigned fair values as of the Vistar Acquisition Date and consolidated with those of T-Mobile. Assigning fair values to the assets acquired and liabilities assumed at the Vistar Acquisition Date requires the use of judgment regarding estimates and assumptions. For the provisionally assigned fair values of the assets acquired and liabilities assumed, we used the cost and income approaches.

The following table summarizes the provisionally assigned fair values for each class of assets acquired and liabilities assumed at the Vistar Acquisition Date. We are in the process of finalizing the valuation of the assets acquired and liabilities assumed, including income tax-related amounts. Therefore, the provisionally assigned fair values set forth below are subject to adjustment as additional information is obtained.

(in millions)	February 3, 2025
Cash and cash equivalents	$	42
Accounts receivable	157
Prepaid expense and other current assets	2
Property and equipment	1
Operating lease right-of-use assets	1
Goodwill	344
Other intangible assets	264
Total assets acquired	811
Accounts payable and accrued liabilities	127
Deferred revenue	1
Deferred tax liabilities	62
Operating lease liabilities	2
Total liabilities assumed	192
Total consideration transferred	$	619

Intangible Assets

Goodwill with a provisionally assigned value of $344 million represents the excess of the consideration transferred over the fair values of assets acquired and liabilities assumed. The provisionally assigned goodwill recognized includes expected growth in service revenues to be achieved from the operations of the combined company, the assembled workforce of Vistar and intangible assets that do not qualify for separate recognition.

Index for Notes to the Condensed Consolidated Financial Statements

Other intangible assets acquired primarily include $201 million of customer relationships with an estimated weighted-average useful life of nine years, $8 million of tradenames with an estimated weighted-average useful life of four years and $55 million of other intangible assets with an estimated weighted-average useful life of four years. The customer relationships are amortized using the sum-of-the-years digits method over their estimated useful lives, and the tradenames are amortized on a straight-line basis over their estimated useful lives.

The preliminary fair value of customer relationships was estimated using the income approach. This fair value measurement is based on significant inputs not observable in the market, and, therefore, represents a Level 3 measurement as defined in ASC 820. The key assumptions in applying the income approach include revenue over an estimated period of time, the discount rate, forecasted expenses and contributory asset charges.

Acquisition of Blis Holdco Limited

On February 18, 2025, we entered into a share purchase agreement for the acquisition of 100% of the outstanding capital stock of Blis Holdco Limited (“Blis”), a provider of advertising solutions (the “Blis Acquisition”).

Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on March 3, 2025 (the “Blis Acquisition Date”), we completed the Blis Acquisition, and as a result, Blis became a wholly owned subsidiary of T-Mobile. In exchange, T-Mobile transferred cash of $180 million. A portion of the payment made on the Blis Acquisition Date was for the settlement of preexisting relationships with Blis and is excluded from the fair value of consideration transferred.

We have accounted for the Blis Acquisition as a business combination. The fair value of consideration transferred as of the Blis Acquisition Date totaled $174 million. The identifiable assets acquired and liabilities assumed from Blis were recorded at their provisionally assigned fair values as of the Blis Acquisition Date and consolidated with those of T-Mobile. The provisionally assigned fair values of total assets acquired, including goodwill, and total liabilities assumed at the Blis Acquisition Date were $276 million and $102 million, respectively. Goodwill with a provisionally assigned value of $112 million represents the excess of the consideration transferred over the fair values of assets acquired and liabilities assumed.

We are in the process of finalizing the valuation of the assets acquired and liabilities assumed. Therefore, the provisionally assigned fair values above are subject to adjustment as additional information is obtained.

Note 3 – Joint Ventures

Lumos and Metronet Joint Ventures

On April 24, 2024, we entered into a definitive agreement with a fund operated by EQT, Infrastructure VI fund (“Fund VI”), to establish a joint venture between us and Fund VI to acquire Lumos (“Lumos”), a fiber-to-the-home platform, from EQT’s predecessor fund, EQT Infrastructure III. Subsequent to March 31, 2025, on April 1, 2025, we completed the joint acquisition of Lumos, upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals. At closing, we invested $926 million to acquire a 50% equity interest in the joint venture and fiber customers. The funds invested by us will be used by the joint venture to fund future fiber builds. In addition, pursuant to the definitive agreement, we expect to make an additional capital contribution of approximately $500 million in 2027 or 2028 under the existing business plan.

On July 18, 2024, we entered into a definitive agreement with KKR & Co. Inc. (“KKR”) to establish a joint venture to acquire Metronet Holdings, LLC and certain of its affiliates (collectively, “Metronet”), a fiber-to-the-home platform. This arrangement is expected to close in mid-2025, subject to customary closing conditions and regulatory approvals. At closing, we expect to invest approximately $4.9 billion to acquire a 50% equity interest in the joint venture and all existing residential fiber customers, as well as funding of the joint venture. We do not anticipate making further capital contributions following the closing under the existing business plan.

We expect to account for the Lumos and Metronet joint ventures under the equity method of accounting and recognize Service revenues for the acquired Lumos and Metronet fiber customers and wholesale costs paid to the joint ventures for network access within Cost of services on our Condensed Consolidated Statements of Comprehensive Income.

Index for Notes to the Condensed Consolidated Financial Statements

Note 4 – Receivables and Related Allowance for Credit Losses

We maintain an allowance for credit losses by applying an expected credit loss model. Each period, management assesses the appropriateness of the level of allowance for credit losses by considering credit risk inherent within each portfolio segment as of the end of the period.

We consider a receivable past due when a customer has not paid us by the contractually specified payment due date. Account balances are written off against the allowance for credit losses if collection efforts are unsuccessful and the receivable balance is deemed uncollectible (customer default), based on factors such as customer credit ratings as well as the length of time the amounts are past due.

Our portfolio of receivables is comprised of two portfolio segments: accounts receivable and equipment installment plan (“EIP”) receivables.

Accounts Receivable Portfolio Segment

Accounts receivable balances are predominately comprised of amounts currently due from customers (e.g., for wireless communications services), device insurance administrators, wholesale partners, other carriers and third-party retail channels.

We estimate credit losses associated with our accounts receivable portfolio segment using an expected credit loss model, which utilizes an aging schedule methodology based on historical information and is adjusted for asset-specific considerations, current economic conditions and reasonable and supportable forecasts.

Our approach considers a number of factors, including our overall historical credit losses and payment experience, as well as current collection trends such as write-off frequency and severity. We also consider other qualitative factors such as current and forecasted macroeconomic conditions.

We consider the need to adjust our estimate of credit losses for reasonable and supportable forecasts of future macroeconomic conditions. To do so, we monitor external forecasts of changes in real U.S. gross domestic product and forecasts of consumer credit behavior for comparable credit exposures.

EIP Receivables Portfolio Segment

Based upon customer credit profiles at the time of customer origination, as well as subsequent credit performance, we classify the EIP receivables segment into two customer classes of “Prime” and “Subprime.” Prime customer receivables are those with lower credit risk, and Subprime customer receivables are those with higher credit risk. Customers may be required to make a down payment on their equipment purchases if their assessed credit risk exceeds established underwriting thresholds. In addition, certain customers within the Subprime category may be required to pay a deposit.

To determine a customer’s credit profile and assist in determining their credit class, we use a proprietary credit scoring model that measures the credit quality of a customer leveraging several factors, such as credit bureau information and consumer credit risk scores, as well as service and device plan characteristics.

EIP receivables had a combined weighted-average effective interest rate of 11.2% and 11.1% as of March 31, 2025, and December 31, 2024, respectively.

The following table summarizes the EIP receivables, including imputed discounts and related allowance for credit losses:

(in millions)	March 31,<br>2025		December 31,<br>2024
EIP receivables, gross	$	7,213	$	7,402
Unamortized imputed discount	(518)		(524)
EIP receivables, net of unamortized imputed discount	6,695		6,878
Allowance for credit losses	(290)		(290)
EIP receivables, net of allowance for credit losses and imputed discount	$	6,405	$	6,588
Classified on our condensed consolidated balance sheets as:
Equipment installment plan receivables, net of allowance for credit losses and imputed discount	$	4,294	$	4,379
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount	2,111		2,209
EIP receivables, net of allowance for credit losses and imputed discount	$	6,405	$	6,588

Index for Notes to the Condensed Consolidated Financial Statements

Many of our loss estimation techniques rely on delinquency-based models categorized by customer credit class; therefore, delinquency is an important indicator of credit quality in the establishment of our allowance for credit losses for EIP receivables. We manage our EIP receivables portfolio segment using delinquency and customer credit class as key credit quality indicators.

The following table presents the amortized cost of our EIP receivables by delinquency status, customer credit class and year of origination as of March 31, 2025:

	Originated in 2025				Originated in 2024				Originated prior to 2024				Total EIP Receivables, Net of <br>Unamortized Imputed Discount
(in millions)	Prime		Subprime		Prime		Subprime		Prime		Subprime		Prime		Subprime		Total
Current - 30 days past due	$	1,314	$	363	$	3,307	$	849	$	602	$	136	$	5,223	$	1,348	$	6,571
31 - 60 days past due	5		5		15		21		3		3		23		29		52
61 - 90 days past due	1		1		10		19		3		2		14		22		36
More than 90 days past due	—		—		10		19		3		4		13		23		36
EIP receivables, net of unamortized imputed discount	$	1,320	$	369	$	3,342	$	908	$	611	$	145	$	5,273	$	1,422	$	6,695

We estimate credit losses on our EIP receivables segment by applying an expected credit loss model, which relies on historical loss data adjusted for current conditions to calculate default probabilities or an estimate for the frequency of customer default. Our assessment of default probabilities or frequency includes receivables delinquency status, historical loss experience, how long the receivables have been outstanding and customer credit ratings, as well as customer tenure. We multiply these estimated default probabilities by our estimated loss given default, which is the estimated amount of default or the severity of loss.

As we do for our accounts receivable portfolio segment, we consider the need to adjust our estimate of credit losses on EIP receivables for reasonable and supportable forecasts of economic conditions through monitoring external forecasts and periodic internal statistical analyses.

The following table presents write-offs of our EIP receivables by year of origination for the three months ended March 31, 2025:

(in millions)	Originated in 2025		Originated in 2024		Originated prior to 2024		Total
Write-offs	$	1	$	128	$	29	$	158

Activity for the three months ended March 31, 2025 and 2024, in the allowance for credit losses and unamortized imputed discount balances for the accounts receivable and EIP receivables segments were as follows:

	March 31, 2025							March 31, 2024
(in millions)	Accounts Receivable Allowance		EIP Receivables Allowance		Total		Accounts Receivable Allowance			EIP Receivables Allowance			Total
Allowance for credit losses and imputed discount, beginning of period	$	176	$	814	$	990		$	161		$	773		$	934
Bad debt expense	165		158		323			132			150			282
Write-offs	(166)		(158)		(324)			(132)			(150)			(282)
Change in imputed discount on short-term and long-term EIP receivables	N/A		36		36			N/A			31			31
Impact on the imputed discount from sales of EIP receivables	N/A		(42)		(42)			N/A			(47)			(47)
Allowance for credit losses and imputed discount, end of period	$	175	$	808	$	983		$	161		$	757		$	918

Off-Balance-Sheet Credit Exposures

We do not have material off-balance-sheet credit exposures as of March 31, 2025. In connection with the sales of certain service accounts receivable and EIP receivables pursuant to the sale arrangements, we provide guarantees of credit performance included on our Condensed Consolidated Balance Sheets measured at fair value that are based on a discounted cash flow model

Index for Notes to the Condensed Consolidated Financial Statements

using Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. See Note 5 – Sales of Certain Receivables for further information.

Note 5 – Sales of Certain Receivables

We regularly enter into transactions to sell certain service accounts receivable and EIP receivables. The transactions, including our continuing involvement with the sold receivables and the respective impacts to our condensed consolidated financial statements, are described below.

Sales of EIP Receivables

Overview of the Transaction

In 2015, we entered into an arrangement to sell certain EIP receivables on a revolving basis (the “EIP Sale Arrangement”), which has been revised and extended from time to time. As of both March 31, 2025, and December 31, 2024, the EIP Sale Arrangement provided funding of $1.3 billion.

In connection with this EIP Sale Arrangement, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity (the “EIP BRE”). We consolidate the EIP BRE under the VIE model.

The following table summarizes the carrying amounts and classification of liabilities, which consist of the recourse guarantee, included on our Condensed Consolidated Balance Sheets with respect to the EIP BRE:

(in millions)	March 31,<br>2025	December 31,<br>2024
Other current liabilities	97	81
Other long-term liabilities	14	32

Sales of Service Accounts Receivable

Overview of the Transaction

In 2014, we entered into an arrangement to sell certain service accounts receivable on a revolving basis (the “Service Receivable Sale Arrangement”). On February 25, 2025, we extended the scheduled expiration date of the Service Receivable Sale Arrangement to February 24, 2026. As of both March 31, 2025, and December 31, 2024, the Service Receivable Sale Arrangement provided funding of $775 million.

In connection with the Service Receivable Sale Arrangement, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity, to sell service accounts receivable (the “Service BRE”). We consolidate the Service BRE under the VIE model.

The following table summarizes the carrying amounts and classification of liabilities included on our Condensed Consolidated Balance Sheets with respect to the Service BRE:

(in millions)	March 31,<br>2025	December 31,<br>2024
Other current liabilities	359	328

Sales of Receivables

On October 22, 2024, we executed an amendment to the EIP Sale Arrangement and an amendment to the Service Receivable Sale Arrangement (together, the “Pledge Amendments”). Prior to the effective date of the Pledge Amendments, the credit enhancement feature of each of the EIP Sale Arrangement and the Service Receivable Sale Arrangement was in the form of a deferred purchase price. Pursuant to the Pledge Amendments, effective on November 1, 2024, the credit enhancement feature of each arrangement is replaced by a recourse guarantee liability, which is collateralized by pledged but unsold receivables.

For the three months ended March 31, 2025, all cash proceeds associated with sold receivables are recognized within Net cash provided by operating activities on our Condensed Consolidated Statements of Cash Flows. For the three months ended March 31, 2024, cash proceeds related to beneficial interests in securitization transactions in the form of the deferred purchase price were presented within Net cash used in investing activities on our Condensed Consolidated Statements of Cash Flows.

Index for Notes to the Condensed Consolidated Financial Statements

The recourse guarantee represents a financial instrument that is primarily tied to the creditworthiness of our customers. At inception, we elected to measure the recourse guarantee liabilities at fair value with changes in fair value included in Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income. The fair value of the recourse guarantee liabilities is determined based on a discounted cash flow model which uses primarily Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. Our recourse guarantee liabilities related to the sales of service receivables and EIP receivables were $140 million and $148 million as of March 31, 2025, and December 31, 2024, respectively. These liabilities were collateralized by $278 million and $286 million of gross service receivables and $510 million and $505 million of gross EIP receivables pledged but unsold as of March 31, 2025, and December 31, 2024, respectively, which represent our maximum exposure under the recourse guarantee.

The following table summarizes the impact of the sales of certain service receivables and EIP receivables on our Condensed Consolidated Balance Sheets:

(in millions)	March 31,<br>2025		December 31,<br>2024
Derecognized net service accounts receivable and EIP receivables	$	1,581	$	1,616
Other current liabilities	456		409
of which, recourse guarantee	126		116
Other long-term liabilities	14		32
of which, recourse guarantee	14		32
Net cash proceeds since inception	1,442		1,468
Of which:
Change in net cash proceeds during the year-to-date period	(26)		(115)
Net cash proceeds funded by reinvested collections	1,468		1,583

We recognized losses from sales of receivables, including changes in fair value of the recourse guarantee liabilities and deferred purchase price assets, of $22 million and $21 million for the three months ended March 31, 2025 and 2024, respectively, in Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income.

Continuing Involvement

Pursuant to the EIP Sale Arrangement and Service Receivable Sale Arrangement described above, we have continuing involvement with the service accounts receivables and EIP receivables we sell, as we service the receivables, are required to replace certain receivables, including ineligible receivables, aged receivables and receivables where a write-off is imminent, and may be responsible for absorbing credit losses through performance under our recourse guarantee liabilities. We continue to service the customers and their related receivables, including facilitating customer payment collection, in exchange for a monthly servicing fee. As the receivables are sold on a revolving basis, the customer payment collections on sold receivables may be reinvested in new receivable sales. At the direction of the purchasers of the sold receivables, we apply the same policies and procedures while servicing the sold receivables as we apply to our owned receivables, and we continue to maintain normal relationships with our customers.

Note 6 – Goodwill, Spectrum License Transactions and Other Intangible Assets

Goodwill

The changes in the carrying amount of goodwill for the three months ended March 31, 2025, are as follows:

(in millions)	Goodwill
Balance as of December 31, 2024, net of accumulated impairment losses of $10,984	$	13,005
Adjustment to goodwill from the Ka’ena Acquisition	6
Provisionally assigned goodwill from acquisitions in 2025	456
Balance as of March 31, 2025, net of accumulated impairment losses of $10,984	$	13,467

Index for Notes to the Condensed Consolidated Financial Statements

Spectrum Licenses

The following table summarizes our spectrum license activity for the three months ended March 31, 2025:

(in millions)	Spectrum
Spectrum licenses, beginning of year	$	100,558
Spectrum license acquisitions	254
Spectrum licenses transferred to held for sale	(2,084)
Costs to clear spectrum	5
Spectrum licenses, end of period	$	98,733

Cash payments to acquire spectrum licenses and payments for costs to clear spectrum are included in Purchases of spectrum licenses and other intangible assets, including deposits, on our Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2025.

License Purchase Agreements

Channel 51 License Co LLC and LB License Co, LLC

On August 8, 2022, we, Channel 51 License Co LLC and LB License Co, LLC (together with Channel 51 License Co LLC, the “Sellers”) entered into License Purchase Agreements pursuant to which we will acquire spectrum in the 600 MHz band from the Sellers in exchange for total cash consideration of $3.5 billion. The licenses will be acquired without any associated networks and are currently being utilized by us through exclusive leasing arrangements with the Sellers.

On March 30, 2023, we and the Sellers entered into Amended and Restated License Purchase Agreements pursuant to which we and the Sellers agreed to separate the transaction into two tranches of licenses, with the closings on the acquisitions of certain licenses in Chicago, Dallas and New Orleans being deferred in order to potentially expedite the regulatory approval process for the remainder of the licenses. Subsequently, on August 25, 2023, we and the Sellers entered into Amendments No. 1 to the Amended and Restated License Purchase Agreements, which deferred the closings of certain additional licenses in Chicago and Dallas into the second closing tranche. Together, the licenses with closings deferred into the second closing tranche represent $1.1 billion of the aggregate $3.5 billion cash consideration. The licenses being acquired by us, and the total consideration being paid for the licenses, remain the same under the original License Purchase Agreements and subsequent amendments.

The Federal Communications Commission (the “FCC”) approved the purchase of the first tranche on December 29, 2023. The first tranche closed on June 24, 2024, and the associated payment of $2.4 billion was made on August 5, 2024.

The FCC approved the purchase of the Dallas licenses included in the second tranche on October 22, 2024. The purchase of the Dallas licenses closed on December 6, 2024, and the associated payment of $541 million was made on the same day.

We anticipate that the remaining deferred licenses from the second tranche of $604 million will close in the second quarter of 2025.

The parties have agreed that each of the closings will occur within 180 days after the receipt of the applicable required regulatory approvals, and payment of each portion of the aggregate $3.5 billion purchase price will occur no later than 40 days after the date of each respective closing.

Comcast Corporation

On September 12, 2023, we entered into a License Purchase Agreement (the “Comcast License Purchase Agreement”) with Comcast Corporation and its affiliate, Comcast OTR1, LLC (together with Comcast Corporation, “Comcast”), pursuant to which we will acquire spectrum in the 600 MHz band from Comcast in exchange for total cash consideration of between $1.2 billion and $3.3 billion, subject to an application for FCC approval. The licenses will be acquired without any associated networks. We anticipate the closing will occur in the first half of 2028.

The final purchase price will be determined, in the aggregate and on a per license basis, based on the set of licenses subject to the Comcast License Purchase Agreement at the time the parties make required transfer filings with the FCC. Prior to the time of such filings, Comcast has the right to remove any or all of a certain specified subset of the licenses, totaling $2.1 billion (the “Optional Sale Licenses”), from the Comcast License Purchase Agreement. The removal of any Optional Sale Licenses would reduce the final purchase price by the assigned value of each such license, from the maximum purchase price of $3.3 billion.

Index for Notes to the Condensed Consolidated Financial Statements

The licenses are subject to an exclusive leasing arrangement between us and Comcast, which was entered into contemporaneously with the Comcast License Purchase Agreement. If Comcast elects to remove an Optional Sale License from the Comcast License Purchase Agreement, the associated lease for such Optional Sale License will terminate, but no sooner than two years from the date of the Comcast License Purchase Agreement (with us having a minimum period of time after any such termination to cease transmitting on such license’s associated spectrum).

On January 13, 2025, we and Comcast entered into an amendment to the Comcast License Purchase Agreement pursuant to which we will acquire additional spectrum. Subsequent to the amendment, the total cash consideration for the transaction is between $1.2 billion and $3.4 billion.

N77 License Co LLC

On September 10, 2024, we entered into a License Purchase Agreement with N77 License Co LLC (“Buyer”), pursuant to which Buyer has the option to purchase all or a portion of our remaining 3.45 GHz spectrum licenses in exchange for a range of cash consideration, with the specific licenses sold to be determined based upon the amount of committed financing raised by Buyer. As of March 31, 2025, $1.8 billion of the associated licenses have been classified as held for sale at cost and presented in Other current assets on our Condensed Consolidated Balance Sheets. The transaction is subject to receipt of regulatory approvals and is expected to close in the second quarter of 2025. The closing of this transaction is not expected to have a material impact on our Condensed Consolidated Statements of Comprehensive Income.

Grain Management, LLC

On March 20, 2025, we announced that we have agreed in principle to a sale of our 800 MHz spectrum licenses to Grain Management, LLC (“Grain”) in exchange for cash consideration and the receipt of Grain’s 600 MHz spectrum licenses. Although a non-binding term sheet has been entered into, no definitive agreements have been executed. The transaction, if finalized, would be subject to FCC approval and certain other customary closing conditions.

Spectrum Exchange Transactions

During the three months ended March 31, 2025 and 2024, we recognized non-cash spectrum license acquisitions associated with the closing of certain spectrum exchange transactions of $172 million and $101 million, respectively.

During the three months ended March 31, 2025 and 2024, we recognized gains associated with the closing of certain spectrum exchange transactions of $12 million and $25 million, respectively, as a reduction to Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income.

As of March 31, 2025, $243 million of spectrum licenses were classified as held for sale within Other assets on our Condensed Consolidated Balance Sheets related to spectrum exchange agreements pending regulatory approval and closing, which are expected to close in the next 12 months. The closings of these transactions are not expected to have a significant impact on our Condensed Consolidated Statements of Comprehensive Income.

Other Intangible Assets

The components of Other intangible assets were as follows:

	Useful Lives		March 31, 2025									December 31, 2024
(in millions)		Gross Amount			Accumulated Amortization			Net Amount			Gross Amount			Accumulated Amortization			Net Amount
Customer relationships (1)	Up to 9 years		$	5,672		$	(4,302)		$	1,370		$	5,427		$	(4,123)		$	1,304
Reacquired rights	Up to 9 years		770			(347)			423			770			(323)			447
Tradenames and patents (1)	Up to 19 years		353			(163)			190			338			(157)			181
Favorable spectrum leases	Up to 27 years		616			(176)			440			620			(169)			451
Other (1)	Up to 10 years		556			(361)			195			478			(349)			129
Other intangible assets			$	7,967		$	(5,349)		$	2,618		$	7,633		$	(5,121)		$	2,512

(1)Includes intangible assets acquired through our acquisitions. See Note 2 - Business Combinations for more information.

Amortization expense for intangible assets subject to amortization was $229 million and $211 million for the three months ended March 31, 2025 and 2024, respectively.

Index for Notes to the Condensed Consolidated Financial Statements

The estimated aggregate future amortization expense for intangible assets subject to amortization is summarized below:

(in millions)	Estimated Future Amortization
Twelve Months Ending March 31,
2026	$	776
2027	591
2028	423
2029	267
2030	163
Thereafter	398
Total	$	2,618

Note 7 – Fair Value Measurements

The carrying values of Cash and cash equivalents, Accounts receivable and Accounts payable and accrued liabilities approximate fair value due to the short-term maturities of these instruments. The carrying values of EIP receivables approximate fair value as the receivables are recorded at their present value using an imputed interest rate.

Derivative Financial Instruments

We use derivatives to manage exposure to market risk, such as exposure to fluctuations in foreign currency exchange rates and interest rates. We designate certain derivatives as hedging instruments in a qualifying hedge accounting relationship to mitigate fluctuations in values or cash flows related to such risks caused by foreign currency or interest rate volatility. We do not use derivatives for trading or speculative purposes.

Cash flows associated with qualifying hedge derivative instruments are presented in the same category on our Condensed Consolidated Statements of Cash Flows as the item being hedged. For fair value hedges, other than foreign currency hedges, the change in the fair value of the derivative instruments is recognized in earnings through the same income statement line item as the change in the fair value of the hedged item. For cash flow hedges, as well as fair value foreign currency hedges, the change in the fair value of the derivative instruments is reported in Accumulated other comprehensive loss and recognized in earnings when the hedged item is recognized in earnings, again, through the same income statement line item.

We record derivatives on our Condensed Consolidated Balance Sheets at fair value that is derived primarily from observable market data, including exchange rates, interest rates and forward curves. These market inputs are utilized in the discounted cash flow calculation considering the instrument's term, notional amount, discount rate and credit risk. Significant inputs to derivative valuations are generally observable in active markets and, as such, are classified as Level 2 in the fair value hierarchy.

Cross-Currency Swaps

We enter into cross-currency swaps to offset changes in the value of our payments on foreign-denominated debt in USD and to mitigate the impact of foreign currency transaction gains and losses.

We have entered into cross-currency swap agreements, with the same notional amounts as our EUR-denominated debt issuances, to effectively convert €4.8 billion to USD borrowings, with the same maturities as our EUR-denominated debt issuances. The swaps qualify and have been designated as fair value hedges of our EUR-denominated debt, mitigating our exposure to foreign currency transaction gains and losses.

Accordingly, all changes in the fair value of the swaps will be initially recorded through Accumulated other comprehensive loss on our Condensed Consolidated Balance Sheets and reclassified to earnings in an amount that exactly offsets the periodic transaction gain or loss on remeasuring the debt, such that there will be no earnings volatility due to changes in foreign-currency exchange rates. Transaction gains or losses on remeasuring the EUR-denominated debt, as well as the offsetting swap amounts, are recorded within Other (expense) income, net on our Condensed Consolidated Statements of Comprehensive Income.

Changes in the fair value of the swaps may be different from the current period transaction gain or loss on remeasurement of the debt, in which case the difference will remain in Accumulated other comprehensive loss on our Condensed Consolidated

Index for Notes to the Condensed Consolidated Financial Statements

Balance Sheets. These differences generally represent credit or liquidity risk, referred to as a basis spread, and the time value of money (“excluded components”). The value of the excluded components is recognized in earnings using a systematic and rational method by accruing the current-period swap settlements into Interest expense, net, on our Condensed Consolidated Statements of Comprehensive Income. If an amount remains in Accumulated other comprehensive loss on our Condensed Consolidated Balance Sheets upon settlement of the derivative, those amounts will be reclassified to earnings at that time.

The following table summarizes the activity of our cross-currency swaps:

(in millions)	Three Months Ended<br>March 31, 2025
Other (expense) income, net
Pre-tax transaction loss on remeasurement of EUR-denominated debt	$	(218)
Amount recognized in Other (expense) income, net reclassified from Accumulated other comprehensive loss	218
Accumulated other comprehensive loss
Amount recognized in Accumulated other comprehensive loss reclassified to Other (expense) income, net	$	(218)
Loss associated with the change in fair value of cross-currency swaps recognized in Accumulated other comprehensive loss	(20)

Interest Rate Lock Derivatives

In April 2020, we terminated our interest rate lock derivatives entered into in October 2018. Aggregate changes in the fair value of our terminated interest rate lock derivatives, net of amortization, of $914 million and $960 million are presented in Accumulated other comprehensive loss on our Condensed Consolidated Balance Sheets as of March 31, 2025, and December 31, 2024, respectively.

For the three months ended March 31, 2025 and 2024, $62 million and $57 million, respectively, were amortized from Accumulated other comprehensive loss into Interest expense, net, on our Condensed Consolidated Statements of Comprehensive Income. We expect to amortize $259 million of the Accumulated other comprehensive loss associated with the derivatives into Interest expense, net, over the 12 months ending March 31, 2026.

Debt

The fair values of our Senior Notes and spectrum-backed Senior Secured Notes to third parties were determined based on quoted market prices in active markets. Accordingly, our Senior Notes and spectrum-backed Senior Secured Notes to third parties were classified as Level 1 within the fair value hierarchy. The fair value of our Senior Notes to affiliates was determined based on the fair value of the Senior Notes to third parties with similar terms and maturities. Accordingly, our Senior Notes to affiliates were classified as Level 2 within the fair value hierarchy. The fair values of our Senior Notes to third parties (EUR-denominated) and asset-backed notes (“ABS Notes”) were primarily based on quoted prices in inactive markets for identical instruments and observable changes in market interest rates, both of which are Level 2 inputs. Accordingly, our Senior Notes to third parties (EUR-denominated) and ABS Notes were classified as Level 2 within the fair value hierarchy. The fair value of our ECA Facility (as defined below) was determined based on a discounted cash flow approach using market interest rates of instruments with similar maturities and credit risk. Accordingly, our ECA Facility was classified as Level 2 within the fair value hierarchy.

Although we have determined the estimated fair values using available market information and commonly accepted valuation methodologies, judgment was required in interpreting market data to develop fair value estimates for the Senior Notes to third parties (EUR-denominated), Senior Notes to affiliates, ABS Notes and ECA Facility. The fair value estimates were based on information available as of March 31, 2025, and December 31, 2024. As such, our estimates are not necessarily indicative of the amount we could realize in a current market exchange.

Index for Notes to the Condensed Consolidated Financial Statements

The carrying amounts and fair values of our short-term and long-term debt included on our Condensed Consolidated Balance Sheets were as follows:

(in millions)	Level within the Fair Value Hierarchy	March 31, 2025						December 31, 2024
		Fair Value		Carrying Amount			Fair Value
Liabilities:
Senior Notes to third parties	1	$	75,232		$	70,002		$	71,783	$	65,631
Senior Notes to third parties (-denominated)	2	5,105			4,995			2,058		2,125
Senior Notes to affiliates	2	1,497			1,500			1,497		1,491
Senior Secured Notes to third parties	1	1,132			1,107			1,361		1,330
ABS Notes to third parties	2	1,851			1,866			1,566		1,570
ECA Facility to third parties	2	927			958			—		—

All values are in Euros.

Note 8 – Debt

The following table sets forth the debt balances and activity as of, and for the three months ended, March 31, 2025:

(in millions)	December 31,<br>2024		Proceeds from Issuances and Borrowings (1)		Repayments		Reclassifications (1)		Other (2)		March 31,<br>2025
Short-term debt	$	4,068	$	—	$	(479)	$	4,628	$	(3)	$	8,214
Long-term debt	72,700		7,768		—		(4,628)		193		76,033
Total debt to third parties	76,768		7,768		(479)		—		190		84,247
Long-term debt to affiliates	1,497		—		—		—		—		1,497
Total debt	$	78,265	$	7,768	$	(479)	$	—	$	190	$	85,744

(1)Issuances and borrowings and reclassifications are recorded net of accrued or paid issuance costs and discounts.

(2)Other includes the amortization of premiums, discounts, debt issuance costs and consent fees and the impact from changes in foreign currency exchange rates.

Our effective interest rate, excluding the impact of derivatives and capitalized interest, was approximately 4.0% and 4.1% on weighted-average debt outstanding of $80.8 billion and $77.4 billion for the three months ended March 31, 2025 and 2024, respectively. The weighted-average debt outstanding was calculated by applying an average of the monthly ending balances of total short-term and long-term debt to third parties and short-term and long-term debt to affiliates, net of unamortized premiums, discounts, debt issuance costs and consent fees.

Issuances and Borrowings

During the three months ended March 31, 2025, we issued and borrowed the following debt:

(in millions)	Principal Issuances		Discounts and Issuance Costs,<br><br>Net (1)		Net Proceeds from Issuance of Long-Term Debt		Issue Date
3.150% Senior Notes due 2032 (EUR-denominated)	$	1,036	$	(5)	$	1,031	February 11, 2025
3.500% Senior Notes due 2037 (EUR-denominated)	1,036		(8)		1,028		February 11, 2025
3.800% Senior Notes due 2045 (EUR-denominated)	777		(7)		770		February 11, 2025
5.125% Senior Notes due 2032	1,250		(7)		1,243		March 27, 2025
5.300% Senior Notes due 2035	1,000		(7)		993		March 27, 2025
5.875% Senior Notes due 2055	1,250		(15)		1,235		March 27, 2025
Total of Senior Notes issued	6,349		(49)		6,300
4.740% Class A Senior ABS Notes due 2029	500		(2)		498		February 27, 2025
Total of ABS Notes issued	500		(2)		498
4.927% ECA Facility due 2036	1,000		(30)		970		March 17, 2025
Total of credit facility borrowed	1,000		(30)		970
Total Issuances and Borrowings	$	7,849	$	(81)	$	7,768

(1)Includes accrued or paid issuance costs and discounts.

Index for Notes to the Condensed Consolidated Financial Statements

Repayments

During the three months ended March 31, 2025, we made the following repayments:

(in millions)	Principal Amount		Payment Date
4.738% Secured Series 2018-1 A-1 Notes due 2025	$	131	January 13, 2025
5.152% Series 2018-1 A-2 Notes due 2028	92		Various
4.910% Class A Senior ABS Notes due 2025	213		Various
ECA Facility due 2036	43		March 17, 2025
Total Repayments	$	479

Subsequent to March 31, 2025, on April 15, 2025, we repaid at maturity $3.0 billion of our 3.500% Senior Notes due 2025.

Asset-backed Notes

On February 27, 2025, we issued $500 million of 4.740% Class A Senior ABS Notes to third parties in a private placement transaction. Net proceeds of $498 million from these ABS Notes are presented in Proceeds from issuance of long-term debt on our Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2025.

As of March 31, 2025, $1.9 billion of our ABS Notes were secured in total by $2.5 billion of gross EIP receivables and future collections on such receivables. Our ABS Notes and the assets securing this debt are included on our Condensed Consolidated Balance Sheets.

The expected maturities of our ABS Notes as of March 31, 2025, were as follows:

(in millions)	Expected Maturities
2025	$	357
2026	594
2027	822
2028	84
Total	$	1,857

Variable Interest Entities

In connection with our ABS Notes issuances, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity (the “ABS BRE”), and a trust (the “ABS Trust” and together with the ABS BRE, the “ABS Entities”), in which the ABS BRE holds a residual interest. Each of the ABS Entities meet the definition of a VIE for which we have determined that we are the primary beneficiary, as we have the power to direct the activities of the ABS Entities that most significantly impact their performance. Accordingly, we include the balances and results of operations of the ABS Entities in our condensed consolidated financial statements.

The following table summarizes the carrying amounts and classification of assets and liabilities included in our Condensed Consolidated Balance Sheets with respect to the ABS Entities:

(in millions)	March 31,<br>2025		December 31,<br>2024
Assets
Equipment installment plan receivables, net	$	1,714	$	1,472
Equipment installment plan receivables due after one year, net	526		352
Other current assets	247		151
Liabilities
Accounts payable and accrued liabilities	$	4	$	2
Short-term debt	427		570
Long-term debt	1,425		996

See Note 4 – Receivables and Related Allowance for Credit Losses for additional information on the EIP receivables used to secure the ABS Notes.

Index for Notes to the Condensed Consolidated Financial Statements

Restricted Cash

Certain provisions of our debt agreements require us to maintain specified cash collateral balances. Amounts associated with these balances are considered to be restricted cash. See Note 15– Additional Financial Information for our reconciliation of Cash and cash equivalents, including restricted cash.

ECA Facility

On January 31, 2025, our wholly owned subsidiary, T-Mobile USA, Inc., entered into a credit agreement with certain financial institutions, backed by an Export Credit Agency (the “ECA Facility”), providing for a loan of up to $1.0 billion to finance network equipment-related purchases. The obligations under the ECA Facility are also guaranteed by us and by all of our wholly owned domestic restricted subsidiaries (subject to customary exceptions). On March 17, 2025, we drew down the full $1.0 billion available under the ECA Facility and recognized the net proceeds within Proceeds from issuance of long-term debt on our Condensed Consolidated Statements of Cash Flows. Borrowings under the ECA facility are amortized semi-annually in equal installments up to the maturity date of March 15, 2036. Interest is based on the Secured Overnight Financing Rate for the interest period plus an applicable margin.

Note 9 – Tower Obligations

Existing CCI Tower Lease Arrangements

In 2012, we conveyed to Crown Castle International Corp. (“CCI”) the exclusive right to manage and operate approximately 6,200 tower sites (“CCI Lease Sites”) via a master prepaid lease with site lease terms ranging from 23 to 37 years. CCI has fixed-price purchase options for the CCI Lease Sites totaling approximately $2.0 billion, exercisable annually on a per-tranche basis at the end of the lease term during the period from December 31, 2035, through December 31, 2049. If CCI exercises its purchase option for any tranche, it must purchase all the towers in the tranche. We lease back a portion of the space at certain tower sites.

Assets and liabilities associated with the operation of the tower sites were transferred to special purpose entities (“SPEs”). Assets included ground lease agreements or deeds for the land on which the towers are situated, the towers themselves and existing subleasing agreements with other mobile network operator tenants that lease space at the tower sites. Liabilities included the obligation to pay ground lease rentals, property taxes and other executory costs.

We determined the SPEs containing the CCI Lease Sites (“Lease Site SPEs”) are VIEs as they lack sufficient equity to finance their activities. We have a variable interest in the Lease Site SPEs but are not the primary beneficiary as we lack the power to direct the activities that most significantly impact the Lease Site SPEs’ economic performance. These activities include managing tenants and underlying ground leases, performing repair and maintenance on the towers, the obligation to absorb expected losses and the right to receive the expected future residual returns from the purchase option to acquire the CCI Lease Sites. As we determined that we are not the primary beneficiary and do not have a controlling financial interest in the Lease Site SPEs, the Lease Site SPEs are not included on our condensed consolidated financial statements.

However, we also considered if this arrangement resulted in the sale of the CCI Lease Sites for which we would derecognize the tower assets. By assessing whether control had transferred, we concluded that transfer of control criteria, as discussed in the revenue standard, were not met. Accordingly, we recorded this arrangement as a financing whereby we recorded debt, a financial obligation, and the CCI Lease Sites tower assets remained on our Condensed Consolidated Balance Sheets. We recorded long-term financial obligations in the amount of the net proceeds received and recognize interest on the tower obligations. The tower obligations are increased by interest expense and amortized through contractual leaseback payments made by us to CCI and through net cash flows generated and retained by CCI from the operation of the tower sites.

Acquired CCI Tower Lease Arrangements

Prior to our merger (the “Sprint Merger”) with Sprint Corporation (“Sprint”), Sprint entered into a lease-out and leaseback arrangement with Global Signal Inc., a third party that was subsequently acquired by CCI, that conveyed to CCI the exclusive right to manage and operate approximately 6,400 tower sites (“Master Lease Sites”) via a master prepaid lease. These agreements were assumed upon the close of the Sprint Merger, at which point the remaining term of the lease-out was approximately 17 years with no renewal options. CCI has a fixed price purchase option for all (but not less than all) of the leased or subleased sites for approximately $2.3 billion, exercisable one year prior to the expiration of the agreement and ending 120 days prior to the expiration of the agreement. We lease back a portion of the space at certain tower sites.

Index for Notes to the Condensed Consolidated Financial Statements

We considered if this arrangement resulted in the sale of the Master Lease Sites for which we would derecognize the tower assets. By assessing whether control had transferred, we concluded that transfer of control criteria, as discussed in the revenue standard, were not met. Accordingly, we recorded this arrangement as a financing whereby we recorded debt, a financial obligation, and the Master Lease Sites tower assets remained on our Condensed Consolidated Balance Sheets.

We recognize interest expense on the tower obligations. The tower obligations are increased by the interest expense and amortized through contractual leaseback payments made by us to CCI. The tower assets are reported in Property and equipment, net on our Condensed Consolidated Balance Sheets and are depreciated to their estimated residual values over the expected useful life of the towers, which is 20 years.

Leaseback Arrangement

On January 3, 2022, we entered into an agreement (the “Crown Agreement”) with CCI. The Crown Agreement extends the current term of the leasebacks by up to 12 years and modifies the leaseback payments for both the Existing CCI Tower Lease Arrangements and the Acquired CCI Tower Lease Arrangements. As a result of the Crown Agreement, there was an increase in our financing obligation as of the effective date of the Crown Agreement of approximately $1.2 billion, with a corresponding decrease to Other long-term liabilities associated with unfavorable contract terms. The modification resulted in a revised interest rate under the effective interest method for the tower obligations: 11.6% for the Existing CCI Tower Lease Arrangements and 5.3% for the Acquired CCI Tower Lease Arrangements. There were no changes made to either of our master prepaid leases with CCI.

The following table summarizes the balances associated with both of the tower arrangements on our Condensed Consolidated Balance Sheets:

(in millions)	March 31,<br>2025		December 31,<br>2024
Property and equipment, net	$	2,032	$	2,069
Tower obligations	3,634		3,664
Other long-term liabilities	554		554

Future minimum payments related to the tower obligations are approximately $382 million for the 12-month period ending March 31, 2026, $793 million in total for both of the 12-month periods ending March 31, 2027 and 2028, $841 million in total for both of the 12-month periods ending March 31, 2029 and 2030, and $3.6 billion in total thereafter.

We are contingently liable for future ground lease payments through the remaining term of the CCI Lease Sites and the Master Lease Sites. These contingent obligations are not included in Operating lease liabilities, as any amount due is contractually owed by CCI based on the subleasing arrangement. Under the arrangement, we remain primarily liable for ground lease payments on approximately 900 sites and have included lease liabilities of $249 million in our Operating lease liabilities as of March 31, 2025.

Note 10 – Revenue from Contracts with Customers

Disaggregation of Revenue

We provide wireless communications services to three primary categories of customers:

•Postpaid customers generally include customers who are qualified to pay after receiving wireless communications services utilizing phones, High Speed Internet, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT);

•Prepaid customers generally include customers who pay for wireless communications services in advance; and

•Wholesale customers include Machine-to-Machine and Mobile Virtual Network Operator customers that operate on our network but are managed by wholesale partners.

Index for Notes to the Condensed Consolidated Financial Statements

Postpaid service revenues, including postpaid phone revenues and postpaid other revenues, were as follows:

	Three Months Ended March 31,
(in millions)		2025		2024
Postpaid service revenues
Postpaid phone revenues		$	11,733	$	11,145
Postpaid other revenues		1,861		1,486
Total postpaid service revenues		$	13,594	$	12,631

The balances presented in each revenue line item on our Condensed Consolidated Statements of Comprehensive Income represent categories of revenue from contracts with customers disaggregated by type of product and service. Postpaid and prepaid service revenues also include revenues earned for providing premium services to customers, such as device insurance services. Revenue generated from the lease of mobile communication devices is included in Equipment revenues on our Condensed Consolidated Statements of Comprehensive Income.

Contract Balances

The contract asset and contract liability balances from contracts with customers as of March 31, 2025, and December 31, 2024, were as follows:

(in millions)	Contract <br>Assets		Contract <br>Liabilities
Balance as of December 31, 2024	$	720	$	1,219
Balance as of March 31, 2025	800		1,192
Change	$	80	$	(27)

Contract assets primarily represent revenue recognized for equipment sales with promotional bill credits offered to customers that are paid over time and are contingent on the customer maintaining a service contract.

The change in the contract asset balance reflects customer activity related to new promotions, offset by billings on existing contracts and impairment, which is recognized as bad debt expense. The current portion of our contract assets of $562 million and $492 million as of March 31, 2025, and December 31, 2024, respectively, was included in Other current assets on our Condensed Consolidated Balance Sheets.

Contract liabilities are recorded when fees are collected, or we have an unconditional right to consideration (a receivable) in advance of delivery of goods or services. Changes in contract liabilities are primarily related to the activity of prepaid customers, including customers acquired through the Ka’ena Acquisition. Contract liabilities are primarily included in Deferred revenue on our Condensed Consolidated Balance Sheets.

Revenues for the three months ended March 31, 2025 and 2024, include the following:

	Three Months Ended March 31,
(in millions)		2025		2024
Amounts included in the beginning of year contract liability balance		$	903	$	698

Remaining Performance Obligations

As of March 31, 2025, the aggregate amount of the transaction price allocated to remaining service performance obligations for postpaid contracts with subsidized devices and promotional bill credits that result in an extended service contract is $1.9 billion. We expect to recognize revenue as the service is provided on these postpaid contracts over an extended contract term of 24 months from the time of origination.

Information about remaining performance obligations that are part of a contract that has an original expected duration of one year or less has been excluded from the above, which primarily consists of monthly service contracts.

Certain of our wholesale, roaming and service contracts include variable consideration based on usage and performance. This variable consideration has been excluded from the disclosure of remaining performance obligations. As of March 31, 2025, the aggregate amount of the contractual minimum consideration for wholesale, roaming and service contracts is $783 million, $1.1 billion and $2.1 billion for the remainder of 2025, 2026 and 2027 and beyond, respectively. These contracts have a remaining duration ranging from less than one year to seven years.

Index for Notes to the Condensed Consolidated Financial Statements

Contract Costs

The balance of deferred incremental costs to obtain contracts with customers was $2.0 billion as of both March 31, 2025, and December 31, 2024, and is included in Other assets on our Condensed Consolidated Balance Sheets. Deferred contract costs incurred to obtain postpaid service contracts are amortized over a period of 24 months. The amortization period is monitored to reflect any significant change in assumptions. Amortization of deferred contract costs included in Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income were $485 million and $489 million for the three months ended March 31, 2025 and 2024, respectively.

The deferred contract cost asset is assessed for impairment on a periodic basis. There were no impairment losses recognized on deferred contract cost assets for the three months ended March 31, 2025 and 2024.

Note 11 – Segment Reporting

We manage our business activities on a consolidated basis and operate as a single operating segment: Wireless. We primarily derive our revenue in the United States by providing wireless communications services to customers using our wireless networks and selling devices that provide customers access to our wireless networks. The accounting policies of the Wireless segment are the same as those described in Part II, Item 8, Note 1 – Summary of Significant Accounting Policies of our Annual Report on Form 10-K for the year ended December 31, 2024.

Our chief operating decision maker (“CODM”) is our President and Chief Executive Officer, G. Michael Sievert. The CODM uses Net income, as reported on our Condensed Consolidated Statements of Comprehensive Income, in evaluating performance of the Wireless segment and determining how to allocate resources of the Company as a whole, including investing in our networks and customers, stockholder return programs and acquisition strategy. The CODM does not review assets in evaluating the results of the Wireless segment, and therefore, such information is not presented.

The following table provides the operating financial results of our Wireless segment:

	Three Months Ended March 31,
(in millions)		2025		2024
Total revenues		$	20,886	$	19,594
Less: Significant and other segment expenses
Cost of equipment sales		4,798		4,399
Employee expenses		1,909		1,683
Lease expense		1,207		1,268
Advertising expense		812		648
Bad debt expense		323		282
Other segment items (1)		3,839		3,945
Depreciation and amortization		3,198		3,371
Interest expense, net		916		880
Other expense (income), net		46		(20)
Income tax expense		885		764
Segment net income		$	2,953	$	2,374

(1)Other segment items included in Segment net income primarily includes certain third-party commissions, external labor and services and backhaul expenses.

Note 12 – Stockholder Return Program

2025 Stockholder Return Program

On December 13, 2024, we announced that our Board of Directors authorized our 2025 Stockholder Return Program of up to $14.0 billion that will run through December 31, 2025 (the “2025 Stockholder Return Program”). The 2025 Stockholder Return Program consists of repurchases of shares of our common stock and the payment of cash dividends. The amount available under the 2025 Stockholder Return Program for share repurchases will be reduced by the amount of any cash dividends declared and paid by us.

On November 21, 2024, our Board of Directors declared a cash dividend of $0.88 per share on our issued and outstanding common stock, which was paid on March 13, 2025, to stockholders of record as of the close of business on February 28, 2025.

Index for Notes to the Condensed Consolidated Financial Statements

On February 6, 2025, our Board of Directors declared a cash dividend of $0.88 per share on our issued and outstanding common stock, which will be paid on June 12, 2025, to stockholders of record as of the close of business on May 30, 2025.

During the three months ended March 31, 2025, we paid an aggregate of $1.0 billion in cash dividends to our stockholders, which was presented within Net cash provided by (used in) financing activities on our Condensed Consolidated Statements of Cash Flows, of which $518 million was paid to Deutsche Telekom AG (“DT”). As of March 31, 2025, $993 million for dividends payable is presented within Other current liabilities on our Condensed Consolidated Balance Sheets, of which $518 million is payable to DT.

During the three months ended March 31, 2025, we repurchased 10,091,227 shares of our common stock at an average price per share of $244.77 for a total purchase price of $2.5 billion, under the 2025 Stockholder Return Program. All shares repurchased during the three months ended March 31, 2025, were purchased at market price. As of March 31, 2025, we had up to $10.5 billion remaining under the 2025 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2025.

Subsequent to March 31, 2025, from April 1, 2025, through April 17, 2025, we repurchased 1,975,200 shares of our common stock at an average price per share of $259.09 for a total purchase price of $512 million. As of April 17, 2025, we had up to $10.0 billion remaining under the 2025 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2025.

Note 13 – Earnings Per Share

The computation of basic and diluted earnings per share was as follows:

	Three Months Ended March 31,
(in millions, except shares and per share amounts)		2025		2024
Net income		$	2,953	$	2,374
Weighted-average shares outstanding – basic		1,140,537,935		1,185,298,497
Effect of dilutive securities:
Outstanding stock options, unvested stock awards		4,117,362		3,793,522
Weighted-average shares outstanding – diluted		1,144,655,297		1,189,092,019
Earnings per share – basic		$	2.59	$	2.00
Earnings per share – diluted		$	2.58	$	2.00
Potentially dilutive securities:
Outstanding stock options and unvested stock awards		961,773		6
Ka’ena Acquisition contingent consideration (1)		979,153		—

(1)     The weighted-average number of shares contingently issuable related to the Ka’ena Acquisition earnout consideration (“Ka’ena Contingent Shares”) are included in potentially dilutive securities based on the maximum number of shares contingently issuable for the earnout and the 20 trading day volume-weighted average price as of March 31, 2025. No Ka’ena Contingent Shares were outstanding during the three months ended March 31, 2025, as the threshold specified performance indicators had not been achieved.

As of March 31, 2025, we had authorized 100 million shares of preferred stock, with a par value of $0.00001 per share. There was no preferred stock outstanding as of March 31, 2025 and 2024. Potentially dilutive securities were not included in the computation of diluted earnings per share if to do so would have been anti-dilutive.

Index for Notes to the Condensed Consolidated Financial Statements

Note 14 – Commitments and Contingencies

Purchase Commitments

We have commitments for non-dedicated transportation lines with varying expiration terms that generally extend through 2038. In addition, we have commitments to purchase wireless devices, network services, equipment, software, marketing sponsorship agreements and other items in the ordinary course of business, with various terms through 2043.

The following table summarizes the timing of such purchase commitments as of March 31, 2025:

(in millions)	Less Than 1 Year		1 - 3 Years		3 - 5 Years		More Than 5 Years		Total
Purchase commitments (1)	$	4,575	$	5,383	$	2,071	$	2,207	$	14,236

(1)     These amounts are not reflective of our entire anticipated purchases under the related agreements but are determined based on the non-cancelable quantities or termination amounts to which we are contractually obligated.

From April 1, 2025, through April 18, 2025, we entered into additional contracts for non-dedicated transportation lines with varying expiration terms that generally extend through 2038 and are expected to increase our total purchase commitments by approximately $1.5 billion.

On April 24, 2024, we entered into a definitive agreement with a fund operated by EQT, Fund VI, to establish a joint venture between us and Fund VI to acquire Lumos, a fiber-to-the-home platform, from EQT’s predecessor fund, EQT Infrastructure III. Subsequent to March 31, 2025, on April 1, 2025, we completed the joint acquisition of Lumos, upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals. At closing, we invested $926 million to acquire a 50% equity interest in the joint venture and fiber customers. The funds invested by us will be used by the joint venture to fund future fiber builds. In addition, pursuant to the definitive agreement, we expect to make an additional capital contribution of approximately $500 million in 2027 or 2028 under the existing business plan. The purchase price and expected additional capital contribution are excluded from our reported purchase commitments above. See Note 3 – Joint Ventures for additional details.

On May 24, 2024, we entered into a securities purchase agreement with UScellular, Telephone and Data Systems, Inc., and USCC Wireless Holdings, LLC, pursuant to which, among other things, we will acquire substantially all of UScellular’s wireless operations and select spectrum assets for an aggregate purchase price of approximately $4.4 billion, payable in cash and the assumption of up to $2.0 billion of debt through an exchange offer to be made to certain UScellular debtholders prior to closing. To the extent any debtholders do not participate in the exchange, their bonds will continue as obligations of UScellular, and the cash portion of the purchase price will be correspondingly increased. Following the closing of the transaction, we will enter into a 15-year master license agreement and estimate the incremental future minimum lease payments will be $1.4 billion over 15 years post-closing. The securities purchase agreement remains subject to regulatory approval. The estimated purchase price and incremental minimum lease payments are excluded from our reported purchase commitments above. See Note 2 – Business Combinations for additional details.

On July 18, 2024, we entered into a definitive agreement with KKR to establish a joint venture to acquire Metronet, a fiber-to-the-home platform. At closing, we expect to invest approximately $4.9 billion to acquire a 50% equity interest in the joint venture and all existing residential fiber customers, as well as funding of the joint venture. The agreement remains subject to regulatory approval, and the estimated purchase price is excluded from our reported purchase commitments above. See Note 3 – Joint Ventures for additional details.

Sprint Merger Commitments

In connection with the regulatory proceedings and approvals of the Sprint Merger pursuant to the Business Combination Agreement with Sprint and the other parties named therein (as amended, the “Business Combination Agreement”) and the other transactions contemplated by the Business Combination Agreement, we have commitments and other obligations to various state and federal agencies and certain nongovernmental organizations, including pursuant to the Consent Decree agreed to by us, DT, Sprint, SoftBank Group Corp. (“SoftBank”) and DISH Network Corporation and entered by the U.S. District Court for the District of Columbia, and the FCC’s memorandum opinion and order approving our applications for approval of the Sprint Merger. These commitments and obligations include, among other things, extensive 5G network build-out commitments, obligations to deliver high-speed wireless services to the vast majority of Americans, including Americans residing in rural areas, and the marketing of an in-home broadband product where spectrum capacity is available. Other commitments relate to national security, pricing, service, employment and support of diversity initiatives. Many of the commitments specify time

Index for Notes to the Condensed Consolidated Financial Statements

frames for compliance and reporting. Failure to fulfill our obligations and commitments in a timely manner could result in substantial fines, penalties, or other legal and administrative actions.

Contingencies and Litigation

Litigation and Regulatory Matters

We are involved in various lawsuits and disputes, claims, government agency investigations and enforcement actions, and other proceedings (“Litigation and Regulatory Matters”) that arise in the ordinary course of business, which include claims of patent infringement (most of which are asserted by non-practicing entities primarily seeking monetary damages), class actions, and proceedings to enforce FCC or other government agency rules and regulations. Those Litigation and Regulatory Matters are at various stages, and some of them may proceed to trial, arbitration, hearing, or other adjudication that could result in fines, penalties, or awards of monetary or injunctive relief in the coming 12 months if they are not otherwise resolved. We have established an accrual with respect to certain of these matters, where appropriate. The accruals are reflected on our condensed consolidated financial statements, but they are not considered to be, individually or in the aggregate, material. An accrual is established when we believe it is both probable that a loss has been incurred and an amount can be reasonably estimated. For other matters, where we have not determined that a loss is probable or because the amount of loss cannot be reasonably estimated, we have not recorded an accrual due to various factors typical in contested proceedings, including, but not limited to, uncertainty concerning legal theories and their resolution by courts or regulators, uncertain damage theories and demands, and a less than fully developed factual record. For Litigation and Regulatory Matters that may result in a contingent gain, we recognize such gains on our condensed consolidated financial statements when the gain is realized or realizable. We recognize legal costs expected to be incurred in connection with Litigation and Regulatory Matters as they are incurred. Except as otherwise specified below, we do not expect that the ultimate resolution of these Litigation and Regulatory Matters, individually or in the aggregate, will have a material adverse effect on our financial position, but we note that an unfavorable outcome of some or all of the specific matters identified below, or other matters that we are or may become involved in could have a material adverse impact on results of operations or cash flows for a particular period. This assessment is based on our current understanding of relevant facts and circumstances. As such, our view of these matters is subject to inherent uncertainties and may change in the future.

On February 28, 2020, T-Mobile and Sprint each received a Notice of Apparent Liability for Forfeiture and Admonishment from the FCC, which proposed a penalty for allegedly violating section 222 of the Communications Act and the FCC’s regulations governing the privacy of customer information. On April 29, 2024, the FCC issued Forfeiture Orders against T-Mobile and Sprint that largely adopted the allegations and conclusions of the Notices of Apparent Liability and imposed penalties on T-Mobile and Sprint. T-Mobile and Sprint paid those penalties under protest, and on June 27, 2024, T-Mobile and Sprint filed Petitions for Review challenging the FCC’s Forfeiture Orders in the United States Court of Appeals for the District of Columbia. We are unable to predict the potential outcome of those proceedings.

On April 1, 2020, in connection with the closing of the Sprint Merger, we assumed the contingencies and litigation matters of Sprint. Those matters include a wide variety of disputes, claims, government agency investigations and enforcement actions, and other proceedings. These matters include, among other things, certain ongoing FCC and state government agency investigations into Sprint’s Lifeline program. In September 2019, Sprint notified the FCC that it had claimed monthly subsidies for serving subscribers, even though these subscribers may not have met usage requirements under Sprint's usage policy for the Lifeline program, due to an inadvertent coding issue in the system used to identify qualifying subscriber usage that occurred in July 2017 while the system was being updated. Sprint has made a number of payments to reimburse the federal government and certain states for excess subsidy payments.

We note that, pursuant to Amendment No. 2, dated as of February 20, 2020, to the Business Combination Agreement, dated as of April 29, 2018, by and among the Company, Sprint and the other parties named therein, SoftBank agreed to indemnify us against certain specified matters and losses, including those relating to the Lifeline matters described above. Resolution of these matters could require us to make additional reimbursements and pay additional fines and penalties, which we do not expect to have a significant impact on our financial results. We expect that any additional liabilities related to these indemnified matters would be indemnified and reimbursed by SoftBank.

On June 1, 2021, a putative shareholder class action and derivative lawsuit was filed in the Delaware Court of Chancery, Dinkevich v. Deutsche Telekom AG, et al., Case No. C.A. No. 2021-0479, against DT, SoftBank and certain of our current and former officers and directors, asserting breach of fiduciary duty claims relating to the repricing amendment to the Business Combination Agreement and to SoftBank’s monetization of its T-Mobile shares. We are also named as a nominal defendant in the case. We are unable to predict the potential outcome of these claims.

Index for Notes to the Condensed Consolidated Financial Statements

On August 12, 2021, we became aware of a cybersecurity issue involving unauthorized access to T-Mobile’s systems (the “August 2021 cyberattack”). We immediately began an investigation and engaged cybersecurity experts to assist with the assessment of the incident and to help determine what data was impacted. Our investigation uncovered that the perpetrator had illegally gained access to certain areas of our systems on or about March 18, 2021, but only gained access to and took data of current, former, and prospective customers beginning on or about August 3, 2021. With the assistance of our outside cybersecurity experts, we located and closed the unauthorized access to our systems and identified current, former and prospective customers whose information was impacted and notified them, consistent with state and federal requirements. We also undertook a number of other measures to demonstrate our continued support and commitment to data privacy and protection. We also coordinated with law enforcement. Our forensic investigation is complete, and we believe we have a full view of the data compromised.

As a result of the August 2021 cyberattack, we have become subject to numerous lawsuits, including mass arbitration claims and multiple class action lawsuits that have been filed in numerous jurisdictions seeking, among other things, unspecified monetary damages, costs and attorneys’ fees arising out of the August 2021 cyberattack. In December 2021, the Judicial Panel on Multidistrict Litigation consolidated the federal class action lawsuits in the U.S. District Court for the Western District of Missouri under the caption In re: T-Mobile Customer Data Security Breach Litigation, Case No. 21-md-3019-BCW. On July 22, 2022, we entered into an agreement to settle the lawsuit. On June 29, 2023, the Court issued an order granting final approval of the settlement. All appeals have been resolved, and the settlement is now final. Under the terms of the settlement, we have paid an aggregate of $350 million to fund claims submitted by class members, the legal fees of plaintiffs’ counsel and the costs of administering the settlement. As required under the terms of the settlement, we have spent an aggregate of $150 million for data security and related technology in 2022 and 2023. The settlement provides a full release of all claims arising out of the August 2021 cyberattack by class members who did not opt out, against all defendants, including us, our subsidiaries and affiliates, and our directors and officers. The settlement contains no admission of liability, wrongdoing or responsibility by any of the defendants.

We anticipate that this settlement of the class action, along with other settlements of separate consumer claims that have been previously completed or are currently pending, will resolve substantially all of the claims brought to date by our current, former and prospective customers who were impacted by the 2021 cyberattack. In connection with the class action settlement and the separate settlements, we recorded a total pre-tax charge of approximately $400 million in the second quarter of 2022.

In addition, in September 2022, a purported Company shareholder filed a derivative action in the Delaware Court of Chancery under the caption Harper v. Sievert et al., Case No. 2022-0819-SG, against our current directors and certain of our former directors, alleging claims for breach of fiduciary duty relating to the Company’s cybersecurity practices. We are also named as a nominal defendant in the lawsuit. On May 31, 2024, the court issued an opinion dismissing the plaintiff’s complaint in its entirety. The plaintiff appealed that decision, and on February 17, 2025, the Delaware Supreme Court affirmed the Court of Chancery’s decision dismissing the complaint. We are unable at this time to predict whether we may be subject to further private litigation relating to the August 2021 cyberattack or the Company’s cybersecurity practices.

We have also received inquiries and contested legal proceedings from various government agencies, law enforcement and other governmental authorities related to the August 2021 cyberattack, which could result in substantial fines or penalties. We reached an agreement with the FCC, which was announced on September 30, 2024, to resolve one of those inquiries. We will continue to cooperate fully with the other agencies and regulators inquiring about the matter with an aim to resolve all of these matters. While we hope to resolve them in the near term, we cannot predict the timing or outcome of any of these matters or whether we may be subject to further regulatory inquiries, investigations, or enforcement actions.

In light of the inherent uncertainties involved in such matters, and based on the information currently available to us, in addition to the previously recorded pre-tax charge of approximately $400 million noted above, we believe it is reasonably possible that we could incur additional losses associated with these proceedings and inquiries, and we will continue to evaluate information as it becomes known and will record an estimate for losses at the time or times when it is both probable that a loss has been incurred and the amount of the loss is reasonably estimable. Ongoing legal and other costs related to these proceedings and inquiries, as well as any potential future actions, may be substantial, and losses associated with any adverse judgments, settlements, penalties or other resolutions of such proceedings and inquiries could be material to our business, reputation, financial condition, cash flows and operating results.

On June 17, 2022, plaintiffs filed a putative antitrust class action complaint in the Northern District of Illinois, Dale et al. v. Deutsche Telekom AG, et al., Case No. 1:22-cv-03189, against DT, T-Mobile, and SoftBank, alleging that the Sprint Merger violated the antitrust laws and harmed competition in the U.S. retail cell service market. Plaintiffs seek injunctive relief and trebled monetary damages on behalf of a purported class of AT&T and Verizon customers whom plaintiffs allege paid artificially inflated prices due to the Sprint Merger. We are vigorously defending this lawsuit, but we are unable to predict the potential outcome.

Index for Notes to the Condensed Consolidated Financial Statements

On January 5, 2023, we identified that a bad actor was obtaining data through a single Application Programming Interface (“API”) without authorization. Based on our investigation, the impacted API is only able to provide a limited set of customer account data, including name, billing address, email, phone number, date of birth, T-Mobile account number and information, such as the number of lines on the account and plan features. The result from our investigation indicates that the bad actor(s) obtained data from this API for approximately 37 million current postpaid and prepaid customer accounts, though many of these accounts did not include the full data set. We believe that the bad actor first retrieved data through the impacted API starting on or around November 25, 2022. We have notified individuals whose information was impacted consistent with state and federal requirements.

In connection with the January 2023 cyberattack, we became subject to consumer class actions and regulatory inquiries, to which we will continue to respond in due course and may incur significant expenses. However, we cannot predict the timing or outcome of any of these potential matters or whether we may be subject to additional legal proceedings, claims, regulatory inquiries, investigations, or enforcement actions. In addition, we are unable to predict the full impact of this incident on customer behavior in the future, including whether a change in our customers’ behavior could negatively impact our results of operations on an ongoing basis, although we presently do not expect that it will have a material effect on our operations.

On February 25, 2025, a purported Company shareholder filed a putative class action and derivative lawsuit in the Delaware Court of Chancery under the caption Palkon v. Deutsche Telekom AG et al., Case No. 2025-0211-PAF, against four DT entities, our current directors, and certain of our former directors, asserting breach of fiduciary duty and unjust enrichment claims relating to our 2022 Stock Repurchase Program and our 2023-2024 Stockholder Return Program. We are also named as a nominal defendant in the lawsuit. We are unable to predict the potential outcome of these claims.

Note 15 – Additional Financial Information

Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities are summarized as follows:

(in millions)	March 31,<br>2025		December 31,<br>2024
Accounts payable	$	4,015	$	4,242
Property and other taxes, including payroll	1,643		1,524
Payroll and related benefits	680		1,072
Accrued interest	947		905
Other accrued liabilities	615		720
Accounts payable and accrued liabilities	$	7,900	$	8,463

Book overdrafts included in accounts payable were $228 million and $460 million as of March 31, 2025, and December 31, 2024, respectively.

Supplemental Condensed Consolidated Statements of Cash Flows Information

The following table summarizes T-Mobile’s supplemental cash flow information:

	Three Months Ended March 31,
(in millions)		2025		2024
Interest payments, net of amounts capitalized		$	934	$	896
Operating lease payments		1,214		1,344
Income tax payments		15		7
Non-cash investing and financing activities
Non-cash beneficial interest obtained in exchange for securitized receivables		$	—	$	661
Change in accounts payable and accrued liabilities for purchases of property and equipment		(463)		(894)
Operating lease right-of-use assets obtained in exchange for lease obligations		481		487
Financing lease right-of-use assets obtained in exchange for lease obligations		248		263

Index for Notes to the Condensed Consolidated Financial Statements

Cash and Cash Equivalents, Including Restricted Cash

Cash and cash equivalents, including restricted cash, presented on our Condensed Consolidated Statements of Cash Flows were included on our Condensed Consolidated Balance Sheets as follows:

(in millions)	March 31,<br>2025		December 31,<br>2024
Cash and cash equivalents	$	12,003	$	5,409
Restricted cash (included in Other current assets)	263		231
Restricted cash (included in Other assets)	78		73
Cash and cash equivalents, including restricted cash	$	12,344	$	5,713

Note 16 – Subsequent Events

Subsequent to March 31, 2025, on April 1, 2025, we completed the joint acquisition of Lumos. See Note 3 - Joint Ventures for additional information.

Subsequent to March 31, 2025, on April 15, 2025, we repaid at maturity $3.0 billion of our 3.500% Senior Notes due 2025.

Subsequent to March 31, 2025, from April 1, 2025, through April 17, 2025, we repurchased 1,975,200 shares of our common stock at an average price per share of $259.09 for a total purchase price of $512 million. See Note 12- Stockholder Return Program for additional information.

Table of Contents

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Cautionary Statement Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q (“Form 10-Q”) of T-Mobile US, Inc. (“T-Mobile,” “we,” “our,” “us” or the “Company”) includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical fact, including information concerning our future results of operations, are forward-looking statements. These forward-looking statements are generally identified by the words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “could” or similar expressions. Forward-looking statements are based on current expectations and assumptions, which are subject to risks and uncertainties that may cause actual results to differ materially from the forward-looking statements. The following important factors, along with the Risk Factors included in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024, and Part II, Item 1A of this Form 10-Q, could affect future results and cause those results to differ materially from those expressed in the forward-looking statements:

•competition, industry consolidation and changes in the market for wireless communications services and other forms of connectivity;

•criminal cyberattacks, disruption, data loss or other security breaches;

•our inability to timely adopt and effectively deploy network technology developments;

•our inability to effectively execute our digital transformation and drive customer and employee adoption of emerging technologies;

•our inability to retain or motivate key personnel, hire qualified personnel or maintain our corporate culture;

•system failures and business disruptions, allowing for unauthorized use of or interference with our network and other systems;

•the scarcity and cost of additional wireless spectrum, and regulations relating to spectrum use;

•the timing and effects of any pending and future acquisition, divestiture, investment, joint venture or merger involving us, including our inability to obtain any required regulatory approval necessary to consummate any such transactions or to achieve the expected benefits of such transactions;

•adverse economic, political or market conditions in the U.S. and international markets, including changes resulting from increases in inflation or interest rates, tariffs and trade restrictions, supply chain disruptions, fluctuations in global currencies, immigration policies, and impacts of geopolitical instability, such as the Ukraine-Russia and Israel-Hamas wars and further escalations thereof;

•potential operational delays, higher procurement and operational costs, and regulatory and compliance complexities as a result of changes to trade policies, including higher tariffs, restrictions and other economic disincentives to trade;

•our inability to successfully deliver new products and services;

•any disruption or failure of our third parties (including key suppliers) to provide products or services for the operation of our business;

•sociopolitical volatility and polarization and risks related to environmental, social and governance matters;

•our substantial level of indebtedness and our inability to service our debt obligations in accordance with their terms;

•changes in the credit market conditions, credit rating downgrades or an inability to access debt markets;

•our inability to maintain effective internal control over financial reporting;

•any changes in regulations or in the regulatory framework under which we operate;

•laws and regulations relating to the handling of privacy, data protection and artificial intelligence;

•unfavorable outcomes of and increased costs from existing or future regulatory or legal proceedings;

•difficulties in protecting our intellectual property rights or if we infringe on the intellectual property rights of others;

•our offering of regulated financial services products and exposure to a wide variety of state and federal regulations;

•new or amended tax laws or regulations or administrative interpretations and judicial decisions affecting the scope or application of tax laws or regulations;

•our wireless licenses, including those controlled through leasing agreements, are subject to renewal and may be revoked;

•our exclusive forum provision as provided in our Certificate of Incorporation;

•interests of Deutsche Telekom AG (“DT”), our controlling stockholder, which may differ from the interests of other stockholders;

Table of Contents

•our current and future stockholder return programs may not be fully utilized, and our share repurchases and dividend payments pursuant thereto may fail to have the desired impact on stockholder value; and

•future sales of our common stock by DT and SoftBank Group Corp. (“SoftBank”) and our inability to attract additional equity financing outside the United States due to foreign ownership limitations by the Federal Communications Commission (“FCC”).

Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements. We undertake no obligation to revise or publicly release the results of any revision to these forward-looking statements, except as required by law.

Investors and others should note that we announce material information to our investors using our investor relations website (https://investor.t-mobile.com), newsroom website (https://t-mobile.com/news), press releases, SEC filings and public conference calls and webcasts. We intend to also use certain social media accounts as a means of disclosing information about us and our services and for complying with our disclosure obligations under Regulation FD (the @TMobileIR X account (https://x.com/TMobileIR), the @MikeSievert X account (https://x.com/MikeSievert) and our Chief Executive Officer’s LinkedIn account (https://www.linkedin.com/in/sievert), both of which Mr. Sievert also uses as a means for personal communications and observations, and the @TMobileCFO X account (https://x.com/tmobilecfo) and our Chief Financial Officer’s LinkedIn account (https://www.linkedin.com/in/peter-osvaldik-3887394), both of which Mr. Osvaldik also uses as a means for personal communication and observations). The information we post through these social media channels may be deemed material. Accordingly, investors should monitor these social media channels in addition to following our press releases, SEC filings and public conference calls and webcasts. The social media channels that we intend to use as a means of disclosing the information described above may be updated from time to time as listed on our investor relations website.

Overview

The objectives of our Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) are to provide users of our condensed consolidated financial statements with the following:

•A narrative explanation from the perspective of management of our financial condition, results of operations, cash flows, liquidity and certain other factors that may affect future results;

•Context to the condensed consolidated financial statements; and

•Information that allows assessment of the likelihood that past performance is indicative of future performance.

Our MD&A is provided as a supplement to, and should be read together with, our unaudited condensed consolidated financial statements as of and for the three months ended March 31, 2025, included in Part I, Item 1 of this Form 10-Q, and audited consolidated financial statements, included in Part II, Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2024. Except as expressly stated, the financial condition and results of operations discussed throughout our MD&A are those of T-Mobile US, Inc. and its consolidated subsidiaries.

Sprint Merger-Related Costs

As of June 30, 2024, we have incurred substantially all restructuring and integration costs associated with our merger (the “Sprint Merger”) with Sprint Corporation (“Sprint”) and, accordingly, no longer separately disclose Sprint Merger-related costs. The cash payments for the Sprint Merger-related costs incurred extend beyond 2025 and primarily relate to operating leases for which we have recognized accelerated lease expense.

Sprint Merger-related costs were excluded from our calculations of Adjusted EBITDA and Core Adjusted EBITDA for the three months ended March 31, 2024, which are non-GAAP financial measures, as we do not consider these costs to be reflective of our ongoing operating performance. See “Adjusted EBITDA and Core Adjusted EBITDA” in the “Performance Measures” section of this MD&A.

Net cash payments for Sprint Merger-related costs, including payments related to our restructuring plan, are included in Net cash provided by operating activities on our Condensed Consolidated Statements of Cash Flows and our calculation of Adjusted Free Cash Flow and were $61 million and $293 million for the three months ended March 31, 2025 and 2024, respectively.

Table of Contents

Joint Ventures

On April 24, 2024, we entered into a definitive agreement with a fund operated by EQT, Infrastructure VI fund (“Fund VI”), to establish a joint venture between us and Fund VI to acquire Lumos (“Lumos”), a fiber-to-the-home platform, from EQT’s predecessor fund, EQT Infrastructure III. Subsequent to March 31, 2025, on April 1, 2025, we completed the joint acquisition of Lumos, upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals. At closing, we invested $926 million to acquire a 50% equity interest in the joint venture and fiber customers. The funds invested by us will be used to fund future fiber builds. In addition, pursuant to the definitive agreement, we expect to make an additional capital contribution of approximately $500 million in 2027 or 2028 under the existing business plan.

On July 18, 2024, we entered into a definitive agreement with KKR & Co. Inc. (“KKR”) to establish a joint venture to acquire Metronet Holdings, LLC and certain of its affiliates (collectively, “Metronet”), a fiber-to-the-home platform. This arrangement is expected to close in mid-2025, subject to customary closing conditions and regulatory approvals. At closing, we expect to invest approximately $4.9 billion to acquire a 50% equity interest in the joint venture and all existing residential fiber customers, as well as funding of the joint venture. We do not anticipate making further capital contributions following the closing under the existing business plan.

The joint ventures will focus on market identification and selection, build plans, network engineering and design, network deployment, and customer installation, with us owning customer relationships and selling fiber service under the T-Mobile brand. We expect to account for the Lumos and Metronet joint ventures under the equity method of accounting and recognize Service revenues for the acquired Lumos and Metronet fiber customers and wholesale costs paid to the joint ventures for network access within Cost of services on our Condensed Consolidated Statements of Comprehensive Income.

Acquisition of Ka’ena Corporation

On May 1, 2024 (the “Ka’ena Acquisition Date”), we completed the merger with Ka’ena Corporation and its subsidiaries, including, among others, Mint Mobile LLC (collectively, “Ka’ena”), and as a result, Ka’ena became a wholly owned subsidiary of T-Mobile (the “Ka’ena Acquisition”). The total purchase price is variable, dependent upon specified performance indicators of Ka’ena, and consists of an upfront payment on the Ka’ena Acquisition Date and an earnout payable on August 1, 2026. On the Ka’ena Acquisition Date and in satisfaction of the upfront payment, we transferred $420 million in cash and 3,264,952 shares of T-Mobile common stock valued at $536 million as determined based on its closing market price on April 30, 2024, for a total payment fair value of $956 million. A portion of the upfront payment made on the Ka’ena Acquisition Date was for the settlement of the preexisting wholesale relationship with Ka’ena. The amount of the upfront payment was subject to customary adjustments, and as a result of such adjustments, $17 million of the upfront payment was returned to T-Mobile during the fourth quarter of 2024, which resulted in a commensurate increase in the maximum payable in satisfaction of the earnout.

Based on the adjusted amount paid upfront, up to an additional $420 million in future cash and T-Mobile common stock is payable in satisfaction of the earnout, dependent upon Ka’ena’s achievement of specified performance indicators.

Prior to the Ka’ena Acquisition, Ka’ena was a wholesale partner of the Company for which we recognized service revenues within Wholesale and other service revenues. Upon the closing of the Ka’ena Acquisition, this relationship was effectively terminated, and the Company acquired Ka’ena’s prepaid customer relationships and began to recognize service revenues associated with these customers within Prepaid revenues and operating expenses primarily within Selling, general and administrative expenses on our Condensed Consolidated Statements of Comprehensive Income subsequent to the Ka’ena Acquisition Date.

For more information regarding the Ka’ena Acquisition, see Note 2 – Business Combinations of the Notes to the Condensed Consolidated Financial Statements.

Acquisition of UScellular Wireless Operations

On May 24, 2024, we entered into a securities purchase agreement with United States Cellular Corporation (“UScellular”), Telephone and Data Systems, Inc., and USCC Wireless Holdings, LLC, pursuant to which, among other things, we will acquire substantially all of UScellular’s wireless operations and select spectrum assets for an aggregate purchase price of approximately $4.4 billion, payable in cash and the assumption of up to $2.0 billion of debt through an exchange offer to certain UScellular debtholders prior to closing (the “UScellular Merger”). To the extent any debtholders do not participate in the exchange, their bonds will continue as obligations of UScellular, and the cash portion of the purchase price will be correspondingly increased. The transaction is expected to close in mid-2025, subject to customary closing conditions and receipt of certain regulatory approvals. Upon closing of the transaction, we expect to account for the UScellular transaction as a business combination and to

Table of Contents

consolidate the acquired operations. We expect this transaction will yield approximately $1.0 billion in total annual run rate cost synergies, including operating expense and capital expenditure synergies, upon integration, with total cost to achieve the integration currently estimated at between $2.2 billion to $2.6 billion.

For more information regarding our acquisition of UScellular’s wireless operations, see Note 2 – Business Combinations of the Notes to the Condensed Consolidated Financial Statements.

Acquisition of Vistar Media Inc.

On December 20, 2024, we entered into an agreement and plan of merger for the acquisition of 100% of the outstanding capital stock of Vistar Media Inc. (“Vistar”), a provider of technology solutions for digital-out-of-home advertisements (the “Vistar Acquisition”).

Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on February 3, 2025 (the “Vistar Acquisition Date”), we completed the Vistar Acquisition, and as a result, Vistar became a wholly owned subsidiary of T-Mobile. In exchange, T-Mobile transferred cash of $621 million.

For more information regarding the Vistar Acquisition, see Note 2 – Business Combinations of the Notes to the Condensed Consolidated Financial Statements.

Acquisition of Blis Holdco Limited

On February 18, 2025, we entered into a share purchase agreement for the acquisition of 100% of the outstanding capital stock of Blis Holdco Limited (“Blis”), a provider of advertising solutions (the “Blis Acquisition”).

Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on March 3, 2025 (the “Blis Acquisition Date”), we completed the Blis Acquisition, and as a result, Blis became a wholly owned subsidiary of T-Mobile. In exchange, T-Mobile transferred cash of $180 million.

For more information regarding the Blis Acquisition, see Note 2 – Business Combinations of the Notes to the Condensed Consolidated Financial Statements.

Table of Contents

Results of Operations

Set forth below is a summary of our consolidated financial results:

	Three Months Ended March 31,				Change
(in millions)	2025		2024			%
Revenues
Postpaid revenues	$	13,594	$	12,631		8	%
Prepaid revenues	2,643		2,403		240	10	%
Wholesale and other service revenues	688		1,062		(374)	(35)	%
Total service revenues	16,925		16,096		829	5	%
Equipment revenues	3,704		3,251		453	14	%
Other revenues	257		247		10	4	%
Total revenues	20,886		19,594		1,292	7	%
Operating expenses
Cost of services, exclusive of depreciation and amortization shown separately below	2,602		2,688		(86)	(3)	%
Cost of equipment sales, exclusive of depreciation and amortization shown separately below	4,798		4,399		399	9	%
Selling, general and administrative	5,488		5,138		350	7	%
Depreciation and amortization	3,198		3,371		(173)	(5)	%
Total operating expenses	16,086		15,596		490	3	%
Operating income	4,800		3,998		802	20	%
Other expense, net
Interest expense, net	(916)		(880)		(36)	4	%
Other (expense) income, net	(46)		20		(66)	(330)	%
Total other expense, net	(962)		(860)		(102)	12	%
Income before income taxes	3,838		3,138		700	22	%
Income tax expense	(885)		(764)		(121)	16	%
Net income	$	2,953	$	2,374		24	%
Statement of Cash Flows Data
Net cash provided by operating activities	$	6,847	$	5,084		35	%
Net cash used in investing activities	(3,409)		(1,787)		(1,622)	91	%
Net cash provided by (used in) financing activities	3,193		(1,666)		4,859	(292)	%
Non-GAAP Financial Measures
Adjusted EBITDA	$	8,259	$	7,652		8	%
Core Adjusted EBITDA	8,258		7,617		641	8	%
Adjusted Free Cash Flow	4,396		3,347		1,049	31	%

All values are in US Dollars.

Table of Contents

The following discussion and analysis is for the three months ended March 31, 2025, compared to the same period in 2024, unless otherwise stated.

Total revenues increased $1.3 billion, or 7%. The components of these changes are discussed below.

Postpaid revenues increased $963 million, or 8%, primarily from:

•Higher postpaid ARPA. See “Postpaid ARPA” in the “Performance Measures” section of this MD&A; and

•Higher average postpaid accounts.

Prepaid revenues increased $240 million, or 10%, primarily from:

•Higher average prepaid customers, primarily from the prepaid customers acquired through the Ka’ena Acquisition; partially offset by

•Lower prepaid ARPU. See “Prepaid ARPU” in the “Performance Measures” section of this MD&A.

Wholesale and other service revenues decreased $374 million, or 35%, primarily from:

•Lower MVNO revenues, including the impact from the Ka’ena Acquisition and lower DISH and TracFone MVNO revenues; and

•Lower Affordable Connectivity Program revenues.

Equipment revenues increased $453 million, or 14%, primarily from:

•An increase of $290 million in device sales revenue, primarily from higher average revenue per device sold, net of promotions, primarily driven by an increase in the high-end phone mix, including the impact of higher postpaid device upgrades and lower Assurance Wireless device sales; and

•An increase of $190 million in liquidation revenue, primarily due to an increase in the high-end phone mix and a higher number of liquidated devices.

Other revenues were essentially flat.

Total operating expenses increased $490 million, or 3%. The components of this change are discussed below.

Cost of services, exclusive of depreciation and amortization, decreased $86 million, or 3%, primarily from $107 million in Sprint Merger-related costs related to network decommissioning and integration recognized in the prior year.

Cost of equipment sales, exclusive of depreciation and amortization, increased $399 million, or 9%, primarily from:

•An increase of $253 million in device cost of equipment sales, primarily from higher average cost per device sold, primarily driven by an increase in the high-end phone mix, including the impact of higher postpaid device upgrades and lower Assurance Wireless device sales; and

•An increase of $132 million in liquidation costs, primarily due to an increase in the high-end phone mix and a higher number of liquidated devices.

Selling, general and administrative expenses increased $350 million, or 7%, primarily from:

•Higher payroll and benefit related expenses; and

•Higher costs as a result of the Ka’ena Acquisition.

Depreciation and amortization decreased $173 million, or 5%, primarily from higher depreciation expense from the acceleration of certain technology assets in the prior year.

Operating income, the components of which are discussed above, increased $802 million, or 20%.

Interest expense, net was essentially flat.

Table of Contents

Other (expense) income, net was insignificant for both periods.

Income before income taxes, the components of which are discussed above, was $3.8 billion and $3.1 billion for the three months ended March 31, 2025 and 2024, respectively.

Income tax expense increased $121 million, or 16%, primarily from:

•Higher income before income taxes; partially offset by

•An increase in excess tax benefits related to the vesting of restricted stock awards.

Our effective tax rate was 23.0% and 24.4% for the three months ended March 31, 2025 and 2024, respectively.

Net income, the components of which are discussed above, was $3.0 billion and $2.4 billion for the three months ended March 31, 2025 and 2024, respectively.

Net income included Sprint Merger-related costs, net of tax, of $97 million for the three months ended March 31, 2024. There were no Sprint Merger-related costs for the three months ended March 31, 2025.

Guarantor Financial Information

Pursuant to the applicable indentures and supplemental indentures, the Senior Notes to affiliates and third parties issued by T-Mobile USA, Inc., Sprint and Sprint Capital Corporation (collectively, the “Issuers”) are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by T-Mobile (“Parent”) and certain of Parent’s 100% owned subsidiaries (“Guarantor Subsidiaries”).

The guarantees of the Guarantor Subsidiaries are subject to release in limited circumstances only upon the occurrence of certain customary conditions. Generally, the guarantees of the Guarantor Subsidiaries with respect to the Senior Notes issued by T-Mobile USA, Inc. (other than $3.5 billion in principal amount of Senior Notes issued in 2017 and 2018) and the credit agreement entered into by T-Mobile USA, Inc. will be automatically and unconditionally released if, immediately following such release and any concurrent releases of other guarantees, the aggregate principal amount of indebtedness of non-guarantor subsidiaries (other than certain specified subsidiaries) would not exceed $2.0 billion. The indentures, supplemental indentures and credit agreements governing the long-term debt contain covenants that, among other things, limit the ability of the Issuers or borrowers and the Guarantor Subsidiaries to incur more debt, create liens or other encumbrances, and to merge, consolidate or sell, or otherwise dispose of, substantially all of their assets.

Basis of Presentation

The following tables include summarized financial information of the obligor groups of debt issued by T-Mobile USA, Inc., Sprint and Sprint Capital Corporation. The summarized financial information of each obligor group is presented on a combined basis with balances and transactions within the obligor group eliminated. Investments in and the equity in earnings of non-guarantor subsidiaries, which would otherwise be consolidated in accordance with GAAP, are excluded from the below summarized financial information pursuant to SEC Regulation S-X Rule 13-01.

The summarized balance sheet information for the consolidated obligor group of debt issued by T-Mobile USA, Inc. is presented in the table below:

(in millions)	March 31, 2025		December 31, 2024
Current assets	$	25,719	$	16,741
Noncurrent assets	176,706		179,335
Current liabilities	21,866		18,279
Noncurrent liabilities	126,418		122,934
Due to non-guarantors	1,547		1,507
Due to related parties	2,058		2,098

Table of Contents

The summarized results of operations information for the consolidated obligor group of debt issued by T-Mobile USA, Inc. is presented in the table below:

(in millions)	Three Months Ended<br>March 31, 2025		Year Ended<br>December 31, 2024
Total revenues	$	20,304	$	78,996
Operating income	3,919		14,463
Net income	2,247		8,360
Revenue from non-guarantors	690		2,619
Operating expenses to non-guarantors	615		2,481
Other income (expense) to non-guarantors	3		(116)

The summarized balance sheet information for the consolidated obligor group of debt issued by Sprint is presented in the table below:

(in millions)	March 31, 2025		December 31, 2024
Current assets	$	18,452	$	10,970
Noncurrent assets	14,830		14,734
Current liabilities	16,446		12,683
Noncurrent liabilities	96,903		96,145
Due to non-guarantors (1)	18,037		21,371
Due to related parties	2,058		2,098

(1)     The decrease in Due to non-guarantors was primarily driven by the impact of certain intercompany settlements during the three months ended March 31, 2025.

The summarized results of operations information for the consolidated obligor group of debt issued by Sprint is presented in the table below:

(in millions)	Three Months Ended<br>March 31, 2025		Year Ended<br>December 31, 2024
Total revenues	$	505	$	330
Operating loss	(914)		(3,628)
Net loss	(2,147)		(8,101)
Other expense, net, to non-guarantors	(112)		(584)

The summarized balance sheet information for the consolidated obligor group of debt issued by Sprint Capital Corporation is presented in the table below:

(in millions)	March 31, 2025		December 31, 2024
Current assets	$	18,452	$	10,970
Noncurrent assets	14,830		14,734
Current liabilities	16,517		12,756
Noncurrent liabilities	93,030		92,278
Due to non-guarantors (1)	9,005		12,318
Due to related parties	2,058		2,098

(1)     The decrease in Due to non-guarantors was primarily driven by the impact of certain intercompany settlements during the three months ended March 31, 2025.

The summarized results of operations information for the consolidated obligor group of debt issued by Sprint Capital Corporation is presented in the table below:

(in millions)	Three Months Ended<br>March 31, 2025		Year Ended<br>December 31, 2024
Total revenues	$	505	$	330
Operating loss	(914)		(3,628)
Net loss	(2,140)		(8,041)
Other expense, net, to non-guarantors	(41)		(257)

Table of Contents

Performance Measures

In managing our business and assessing financial performance, we supplement the information provided by our condensed consolidated financial statements with other operating or statistical data and non-GAAP financial measures. These operating and financial measures are utilized by our management to evaluate our operating performance and, in certain cases, our ability to meet liquidity requirements. Although companies in the wireless communications services industry may not define each of these measures in precisely the same way, we believe that these measures facilitate comparisons with other companies in the wireless industry on key operating and financial measures.

Postpaid Accounts

A postpaid account is generally defined as a billing account number that generates revenue. Postpaid accounts generally consist of customers that are qualified for postpaid service utilizing phones, High Speed Internet modems, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT), where they generally pay after receiving service.

The following table sets forth the number of ending postpaid accounts:

	As of March 31,		Change
(in thousands)	2025	2024	#	%
Postpaid accounts	31,099	30,015	1,084	4	%

Postpaid Net Account Additions

The following table sets forth the number of postpaid net account additions:

	Three Months Ended March 31,		Change
(in thousands)	2025	2024	#	%
Postpaid net account additions	205	218	(13)	(6)	%

Postpaid net account additions decreased 13,000, or 6%, for the three months ended March 31, 2025, primarily from higher account deactivations, including the impact from a growing account base and the temporary impact of current year rate plan optimizations, partially offset by higher gross account additions.

Customers

A customer is generally defined as a SIM number with a unique T-Mobile identifier which is associated with an account that generates revenue. Customers are qualified either for postpaid service utilizing phones, High Speed Internet modems, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT), where they generally pay after receiving service, or prepaid service, where they generally pay in advance of receiving service.

The following table sets forth the number of ending customers:

	As of March 31,		Change
(in thousands)	2025	2024	#	%
Customers, end of period
Postpaid phone customers	79,508	76,468	3,040	4	%
Postpaid other customers	25,947	22,804	3,143	14	%
Total postpaid customers	105,455	99,272	6,183	6	%
Prepaid customers	25,455	21,600	3,855	18	%
Total customers	130,910	120,872	10,038	8	%

High Speed Internet customers included in Postpaid other customers were 6,129,000 and 4,634,000 as of March 31, 2025 and 2024, respectively. High Speed Internet customers included in Prepaid customers were 725,000 and 547,000 as of March 31, 2025 and 2024, respectively.

Table of Contents

Net Customer Additions (Losses)

The following table sets forth the number of net customer additions (losses):

	Three Months Ended March 31,			Change
(in thousands)	2025	2024	#		%
Net customer additions (losses)
Postpaid phone customers	495	532		(37)		(7)	%
Postpaid other customers	842	688		154		22	%
Total postpaid customers	1,337	1,220		117		10	%
Prepaid customers	45	(48)		93		(194)	%
Total net customer additions	1,382	1,172		210		18	%

Total net customer additions increased 210,000, or 18%, primarily from:

•Higher postpaid other net customer additions, primarily due to

•Higher net additions from other connected devices;

•Higher net additions from mobile internet devices; and

•Higher net additions from High Speed Internet; partially offset by

•Increased deactivations from a growing customer base; and

•Lower net additions from wearables; and

•Higher prepaid net customer additions, primarily from higher net additions following the Ka’ena Acquisition and lower prepaid to postpaid migrations, partially offset by continued moderation of prepaid industry growth; partially offset by

•Lower postpaid phone net customer additions from higher churn, primarily driven by the temporary impact of current year rate plan optimizations, increased deactivations from a growing customer base and lower prepaid to postpaid migrations, partially offset by higher gross additions.

•High Speed Internet net customer additions included in postpaid other net customer additions were 387,000 and 346,000 for the three months ended March 31, 2025 and 2024, respectively. High Speed Internet net customer additions included in prepaid net customer additions (losses) were 37,000 and 59,000 for the three months ended March 31, 2025 and 2024, respectively.

Churn

Churn represents the number of customers whose service was deactivated as a percentage of the average number of customers during the specified period further divided by the number of months in the period. The number of customers whose service was deactivated is presented net of customers that subsequently had their service restored within a certain period of time and excludes customers who received service for less than a certain minimum period of time. We believe that churn provides management, investors and analysts with useful information to evaluate customer retention and loyalty.

The following table sets forth the churn:

		Three Months Ended March 31,					Change
	2025			2024
Postpaid phone churn		0.91	%		0.86	%	5 bps
Prepaid churn		2.68	%		2.75	%	-7 bps

Postpaid phone churn increased 5 basis points, primarily from the temporary impact of current year rate plan optimizations.

Prepaid churn decreased 7 basis points, primarily driven by the inclusion of prepaid customers associated with the Ka’ena Acquisition with lower churn.

Postpaid Average Revenue Per Account

Postpaid Average Revenue per Account (“ARPA”) represents the average monthly postpaid service revenue earned per account. Postpaid ARPA is calculated as Postpaid revenues for the specified period divided by the average number of postpaid accounts during the period, further divided by the number of months in the period. We believe postpaid ARPA provides management, investors and analysts with useful information to assess and evaluate our postpaid service revenue realization and

Table of Contents

assists in forecasting our future postpaid service revenues on a per account basis. We consider postpaid ARPA to be indicative of our revenue growth potential given the increase in the average number of postpaid phone customers per account and increases in postpaid other customers, including High Speed Internet, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT).

The following table sets forth our operating measure ARPA:

(in dollars)		Three Months Ended March 31,
	2025			2024					%
Postpaid ARPA		$	146.22		$	140.88		5.34		4	%

All values are in US Dollars.

Postpaid ARPA increased $5.34, or 4%, primarily from:

•An increase in customers per account, including from the continued adoption of High Speed Internet;

•Higher premium services, primarily high-end rate plans, net of contra-revenues for content included in such plans, and discounts for specific affinity groups, such as 55+, military and first responders; and

•The positive impact from prior year rate plan optimizations; partially offset by

•Increased promotional activity; and

•An increase in total High Speed Internet only accounts.

Average Revenue Per User

Average Revenue per User (“ARPU”) represents the average monthly service revenue earned per customer. ARPU is calculated as service revenues for the specified period divided by the average number of customers during the period, further divided by the number of months in the period. We believe ARPU provides management, investors and analysts with useful information to assess and evaluate our service revenue per customer and assist in forecasting our future service revenues generated from our customer base. Postpaid phone ARPU excludes postpaid other customers and related revenues, which include High Speed Internet, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT).

The following table sets forth our operating measure ARPU:

(in dollars)		Three Months Ended March 31,
	2025			2024					%
Postpaid phone ARPU		$	49.38		$	48.79		0.59		1	%
Prepaid ARPU		34.67			37.18					(7)	%

All values are in US Dollars.

Postpaid Phone ARPU

Postpaid phone ARPU increased $0.59, or 1%, primarily from:

•Higher premium services, primarily high-end rate plans, net of contra-revenues for content included in such plans, and discounts for specific affinity groups, such as 55+, military and first responders; and

•The positive impact from prior year rate plan optimizations; partially offset by

•Increased promotional activity, including the success of bundled offerings and continued growth in T-Mobile for Business customers with lower ARPU given large account sizes.

Prepaid ARPU

Prepaid ARPU decreased $2.51, or 7%, primarily from the inclusion of prepaid customers with lower ARPU associated with the Ka’ena Acquisition.

Table of Contents

Adjusted EBITDA and Core Adjusted EBITDA

Adjusted EBITDA represents earnings before Interest expense, net of Interest income, Income tax expense, Depreciation and amortization, stock-based compensation and certain expenses, gains and losses, which are not reflective of our ongoing operating performance (“Special Items”). Special Items include Sprint Merger-related costs, UScellular Merger-related costs, certain legal-related expenses, restructuring costs not directly attributable to the Sprint Merger or UScellular Merger (including severance), and other non-core gains and losses. Core Adjusted EBITDA represents Adjusted EBITDA less device lease revenues. Adjusted EBITDA margin represents Adjusted EBITDA divided by Service revenues. Core Adjusted EBITDA margin represents Core Adjusted EBITDA divided by Service revenues.

Adjusted EBITDA, Adjusted EBITDA margin, Core Adjusted EBITDA and Core Adjusted EBITDA margin are non-GAAP financial measures utilized by our management, including our chief operating decision maker, to monitor the financial performance of our operations and allocate resources of the Company as a whole. We historically used Adjusted EBITDA, and we currently use Core Adjusted EBITDA internally as a measure to evaluate and compensate our personnel and management for their performance. We use Adjusted EBITDA and Core Adjusted EBITDA as benchmarks to evaluate our operating performance in comparison to our competitors. Management believes analysts and investors use Adjusted EBITDA and Core Adjusted EBITDA as supplemental measures to evaluate overall operating performance and to facilitate comparisons with other wireless communications services companies because they are indicative of our ongoing operating performance and trends by excluding the impact of interest expense from financing, non-cash depreciation and amortization from capital investments, non-cash stock-based compensation, and Special Items. Management believes analysts and investors use Core Adjusted EBITDA because it normalizes for the transition in the Company’s device financing strategy, by excluding the impact of device lease revenues from Adjusted EBITDA, to align with the exclusion of the related depreciation expense on leased devices from Adjusted EBITDA. Adjusted EBITDA, Adjusted EBITDA margin, Core Adjusted EBITDA and Core Adjusted EBITDA margin have limitations as analytical tools and should not be considered in isolation or as substitutes for income from operations, net income or any other measure of financial performance reported in accordance with GAAP.

Table of Contents

The following table illustrates the calculation of Adjusted EBITDA and Core Adjusted EBITDA and reconciles Adjusted EBITDA and Core Adjusted EBITDA to Net income, which we consider to be the most directly comparable GAAP financial measure:

	Three Months Ended March 31,
(in millions, except percentages)	2025			2024					%
Net income	$	2,953		$	2,374			579		24	%
Adjustments:
Interest expense, net	916			880						4	%
Other expense (income), net	46			(20)						(330)	%
Income tax expense	885			764						16	%
Operating income	4,800			3,998						20	%
Depreciation and amortization	3,198			3,371						(5)	%
Stock-based compensation (1)	168			140						20	%
Sprint Merger-related costs	—			130						(100)	%
UScellular Merger-related costs (2)	14			—						NM
Legal-related expenses, net (3)	6			—						NM
Other, net (4)	73			13						462	%
Adjusted EBITDA	8,259			7,652						8	%
Lease revenues	(1)			(35)						(97)	%
Core Adjusted EBITDA	$	8,258		$	7,617			641		8	%
Net income margin (Net income divided by Service revenues)	17		%	15		%				200 bps
Adjusted EBITDA margin (Adjusted EBITDA divided by Service revenues)	49		%	48		%				100 bps
Core Adjusted EBITDA margin (Core Adjusted EBITDA divided by Service revenues)	49		%	47		%				200 bps

All values are in US Dollars.

(1)Stock-based compensation includes payroll tax impacts and may not agree with stock-based compensation expense on the condensed consolidated financial statements. Additionally, certain stock-based compensation expenses associated with the Sprint Merger have been included in Sprint Merger-related costs.

(2)UScellular Merger-related costs generally include pre-merger consulting and legal fees.

(3)Legal-related expenses, net, consists of the settlement of certain litigation and compliance costs associated with the August 2021 cyberattack and is presented net of insurance recoveries.

(4)Other, net, primarily consists of certain severance, restructuring and other expenses, gains and losses, not directly attributable to the Sprint Merger or UScellular Merger, which are not reflective of T-Mobile’s core business activities and are, therefore, excluded from Adjusted EBITDA and Core Adjusted EBITDA.

NM - Not meaningful

Core Adjusted EBITDA increased $641 million, or 8%, for the three months ended March 31, 2025. The components comprising Core Adjusted EBITDA are discussed further above.

The increase was primarily from:

•Higher Total service revenues; and

•Higher Equipment revenues, excluding lease revenues; partially offset by

•Higher Cost of equipment sales; and

•Higher Selling, general and administrative expenses, excluding Special Items.

Adjusted EBITDA increased $607 million, or 8%, for the three months ended March 31, 2025, primarily due to the increase in Core Adjusted EBITDA, discussed above, partially offset by lower lease revenues, which decreased $34 million for the three months ended March 31, 2025.

Table of Contents

Liquidity and Capital Resources

Our principal sources of liquidity are our cash and cash equivalents and cash generated from operations, proceeds from issuance of debt, financing leases, the sale of certain receivables, the Revolving Credit Facility (as defined below) and an unsecured short-term commercial paper program. Further, the incurrence of additional indebtedness may inhibit our ability to incur new debt in the future to finance our business strategy under the terms governing our existing and future indebtedness.

Cash Flows

The following is a condensed schedule of our cash flows:

	Three Months Ended March 31,				Change
(in millions)	2025		2024			%
Net cash provided by operating activities	$	6,847	$	5,084		35	%
Net cash used in investing activities	(3,409)		(1,787)		(1,622)	91	%
Net cash provided by (used in) financing activities	3,193		(1,666)		4,859	(292)	%

All values are in US Dollars.

Operating Activities

Net cash provided by operating activities increased $1.8 billion, or 35%, primarily from:

•A $1.1 billion decrease in net cash outflows from changes in working capital, primarily due to lower use of cash from Accounts payable and accrued liabilities, Accounts receivable and Short- and long-term operating lease liabilities, partially offset by higher use of cash from Inventory, Equipment installment plan receivables and Other current and long-term assets; and

•A $663 million increase in Net income, adjusted for non-cash income and expenses.

•Net cash provided by operating activities includes the impact of the Pledge Amendments as described below.

•Net cash provided by operating activities includes the impact of $61 million and $293 million in net payments for Sprint Merger-related costs for the three months ended March 31, 2025 and 2024, respectively.

Investing Activities

Net cash used in investing activities increased $1.6 billion, or 91%. The use of cash was primarily from:

•$2.5 billion in Purchases of property and equipment, including capitalized interest, from the continued build-out of our nationwide 5G network; and

•$727 million of cash consideration, net of cash acquired, related to our acquisitions of Vistar and Blis.

Financing Activities

Net cash provided by financing activities increased $4.9 billion from a net use of cash for the three months ended March 31, 2024, to a net source of cash for the three months ended March 31, 2025. The net source of cash was primarily from:

•$7.8 billion in Proceeds from issuance of long-term debt; partially offset by

•$2.5 billion in Repurchases of common stock;

•$1.0 billion in Dividends on common stock;

•$479 million in Repayments of long-term debt;

•$315 million in Repayments of financing lease obligations; and

•$272 million in Tax withholdings on share-based awards.

Cash and Cash Equivalents

As of March 31, 2025, our Cash and cash equivalents were $12.0 billion compared to $5.4 billion at December 31, 2024.

Table of Contents

Adjusted Free Cash Flow

Adjusted Free Cash Flow represents Net cash provided by operating activities less cash payments for Purchases of property and equipment, plus Proceeds related to beneficial interests in securitization transactions. Adjusted Free Cash Flow is a non-GAAP financial measure utilized by management, investors and analysts of our financial information to evaluate cash available to pay debt, repurchase shares, pay dividends and provide further investment in the business. Adjusted Free Cash Flow margin is calculated as Adjusted Free Cash Flow divided by Service revenues. Adjusted Free Cash Flow margin is utilized by management, investors, and analysts to evaluate the Company’s ability to convert service revenue efficiently into cash available to pay debt, repurchase shares, pay dividends and provide further investment in the business.

The table below provides a reconciliation of Adjusted Free Cash Flow to Net cash provided by operating activities, which we consider to be the most directly comparable GAAP financial measure:

	Three Months Ended March 31,
(in millions, except percentages)	2025			2024					%
Net cash provided by operating activities	$	6,847		$	5,084			1,763		35	%
Cash purchases of property and equipment, including capitalized interest	(2,451)			(2,627)						(7)	%
Proceeds related to beneficial interests in securitization transactions	—			890						(100)	%
Adjusted Free Cash Flow	$	4,396		$	3,347			1,049		31	%
Net cash provided by operating activities margin (Net cash provided by operating activities divided by Service revenues)	40		%	32		%				800 bps
Adjusted Free Cash Flow margin (Adjusted Free Cash Flow divided by Service revenues)	26		%	21		%				500 bps

All values are in US Dollars.

Adjusted Free Cash Flow increased $1.0 billion, or 31%, for the three months ended March 31, 2025, primarily from:

•Higher Net cash provided by operating activities, as described above; and

•Lower Cash purchases of property and equipment, including capitalized interest, driven by planned timing of capital purchases; partially offset by

•Proceeds related to beneficial interests in securitization transactions recognized in the prior year.

•Adjusted Free Cash Flow includes the impact of $61 million and $293 million for the three months ended March 31, 2025 and 2024, respectively, in net payments for Sprint Merger-related costs.

During the three months ended March 31, 2025 and 2024, there were no significant net cash proceeds from securitization.

On October 22, 2024, we executed amendments (the “Pledge Amendments”) to the EIP Sale Arrangement and the Service Receivable Sale Arrangement (as discussed in Note 5 – Sales of Certain Receivables of the Notes to the Condensed Consolidated Financial Statements). Following the effective date of the Pledge Amendments of November 1, 2024, all cash proceeds associated with the sale of such receivables, a portion of which, prior to November 1, 2024, were recognized as Proceeds related to beneficial interests in securitization transactions within Net cash used in investing activities on our Condensed Consolidated Statements of Cash Flows, were recognized as operating cash flows. The Pledge Amendments did not have a net impact on Adjusted Free Cash Flow.

Borrowing Capacity

We maintain a revolving credit facility (the “Revolving Credit Facility”) with an aggregate commitment amount of $7.5 billion. As of March 31, 2025, there was no outstanding balance under the Revolving Credit Facility.

We maintain an unsecured short-term commercial paper program with the ability to borrow up to $2.0 billion from time to time. This program supplements our other available external financing arrangements and proceeds are expected to be used for general corporate purposes. As of March 31, 2025, there was no outstanding balance under this program.

Debt Financing

On January 31, 2025, our wholly owned subsidiary, T-Mobile USA, Inc., entered into a credit agreement with certain financial institutions, backed by an Export Credit Agency (the “ECA Facility”), providing for a loan of up to $1.0 billion. On March 17, 2025, we drew down the full $1.0 billion available under the ECA Facility and recognized the net proceeds within Proceeds from issuance of long-term debt on our Condensed Consolidated Statements of Cash Flows.

Table of Contents

As of March 31, 2025, our total debt and financing lease liabilities were $88.0 billion, excluding our tower obligations, of which $77.5 billion was classified as long-term debt and $1.1 billion was classified as long-term financing lease liabilities.

During the three months ended March 31, 2025, we issued long-term debt for net proceeds of $7.8 billion, including proceeds from the ECA Facility, and repaid short-term debt with an aggregate principal amount of $479 million.

Subsequent to March 31, 2025, on April 15, 2025, we repaid at maturity $3.0 billion of our 3.500% Senior Notes due 2025.

For more information regarding our debt financing transactions, see Note8– Debt of the Notes to the Condensed Consolidated Financial Statements.

License Purchase Agreements

On August 8, 2022, we entered into License Purchase Agreements to acquire spectrum in the 600 MHz band from Channel 51 License Co LLC and LB License Co, LLC (together with Channel 51 License Co LLC, the “Sellers”) in exchange for total cash consideration of $3.5 billion. On March 30, 2023, we and the Sellers entered into Amended and Restated License Purchase Agreements, pursuant to which we and the Sellers agreed to bifurcate the transaction into two tranches of licenses, with the closings on the acquisitions of certain licenses in Chicago, Dallas and New Orleans being deferred in order to potentially expedite the regulatory approval process for the remainder of the licenses. Subsequently, on August 25, 2023, we and the Sellers entered into Amendments No. 1 to the Amended and Restated License Purchase Agreements, whereby we deferred the closings of certain additional licenses in Chicago and Dallas into the second closing tranche. Together, the licenses with closings deferred into the second closing tranche represent approximately $1.1 billion of the aggregate $3.5 billion cash consideration.

The FCC approved the purchase of the first tranche on December 29, 2023. The first tranche closed on June 24, 2024, and the associated payment of $2.4 billion was made on August 5, 2024.

The FCC approved the purchase of the Dallas licenses included in the second tranche on October 22, 2024. The purchase of the Dallas licenses closed on December 6, 2024, and the associated payment of $541 million was made on the same day.

We anticipate that the remaining deferred licenses from the second tranche of $604 million will close in the second quarter of 2025.

The parties have agreed that each of the closings will occur within 180 days after the receipt of the applicable required regulatory approvals, and payment of each portion of the aggregate $3.5 billion purchase price will occur no later than 40 days after the date of each respective closing.

On September 12, 2023, we entered into a License Purchase Agreement with Comcast (the “Comcast License Purchase Agreement”) pursuant to which we will acquire spectrum in the 600 MHz band from Comcast in exchange for total cash consideration of between $1.2 billion and $3.3 billion, subject to an application for FCC approval. The licenses are subject to an exclusive leasing arrangement between us and Comcast entered into contemporaneously with the Comcast License Purchase Agreement. On January 13, 2025, we and Comcast entered into an amendment to the Comcast License Purchase Agreement pursuant to which we will acquire additional spectrum. Subsequent to the amendment, the total cash consideration for the transaction is between $1.2 billion and $3.4 billion. We anticipate the closing will occur in the first half of 2028.

On September 10, 2024, we entered into a License Purchase Agreement with N77 License Co LLC (“Buyer”), pursuant to which Buyer has the option to purchase all or a portion of our remaining 3.45 GHz spectrum licenses in exchange for a range of cash consideration, with the specific licenses sold to be determined based upon the amount of committed financing raised by Buyer. As of March 31, 2025, $1.8 billion of the associated licenses have been classified as held for sale at cost and presented in Other current assets on our Condensed Consolidated Balance Sheets. The transaction is subject to receipt of regulatory approvals and is expected to close in the second quarter of 2025. The closing of this transaction is not expected to have a material impact on our Condensed Consolidated Statements of Comprehensive Income.

Lumos Joint Venture

On April 24, 2024, we entered into a definitive agreement with Fund VI to establish a joint venture between us and Fund VI to acquire Lumos from EQT’s predecessor fund, EQT Infrastructure III. Subsequent to March 31, 2025, on April 1, 2025, we completed the joint acquisition of Lumos. At closing, we invested $926 million to acquire a 50% equity interest in the joint venture and fiber customers. The funds invested by us will be used to fund future fiber builds. In addition, pursuant to the

Table of Contents

definitive agreement, we expect to make an additional capital contribution of approximately $500 million in 2027 or 2028 under the existing business plan.

For more information regarding the Lumos joint venture, see Note 3 – Joint Ventures of the Notes to the Condensed Consolidated Financial Statements.

Acquisition of Ka’ena Corporation

On May 1, 2024, we completed the Ka’ena Acquisition. The total purchase price is variable, dependent upon specified performance indicators of Ka’ena, and consists of an upfront payment on the Ka’ena Acquisition Date and an earnout payable on August 1, 2026.

Based on the adjusted amount paid upfront, up to an additional $420 million in future cash and T-Mobile common stock is payable in satisfaction of the earnout, dependent upon Ka’ena’s achievement of specified performance indicators.

For more information regarding the Ka’ena Acquisition, see Note 2 – Business Combinations of the Notes to the Condensed Consolidated Financial Statements.

Acquisition of UScellular Wireless Operations

On May 24, 2024, we entered into a securities purchase agreement with UScellular pursuant to which, among other things, we will acquire substantially all of UScellular’s wireless operations and select spectrum assets for an aggregate purchase price of approximately $4.4 billion, payable in cash and the assumption of up to $2.0 billion of debt through an exchange offer to certain UScellular debtholders prior to closing. To the extent any debtholders do not participate in the exchange, their bonds will continue as obligations of UScellular, and the cash portion of the purchase price will be correspondingly increased. The transaction is expected to close in mid-2025, subject to customary closing conditions and receipt of certain regulatory approvals.

Following the closing of the transaction, UScellular will retain ownership of its other spectrum, as well as its towers. Subject to the closing of the transaction, we will enter into a 15-year master license agreement to lease space on at least 2,100 towers being retained and to extend our tenancy term on approximately 600 towers where we are already leasing space from UScellular for 15 years post-closing. We estimate the incremental future minimum lease payments associated with the master license agreement will be $1.4 billion over 15 years post-closing.

Metronet Joint Venture

On July 18, 2024, we entered into a definitive agreement with KKR to establish a joint venture to acquire Metronet. This arrangement is expected to close in mid-2025, subject to customary closing conditions and regulatory approvals. At closing, we expect to invest approximately $4.9 billion to acquire a 50% equity interest in the joint venture and all existing residential fiber customers, as well as funding of the joint venture. We do not anticipate making further capital contributions following the closing under the existing business plan.

For more information regarding the Metronet joint venture, see Note 3 – Joint Ventures of the Notes to the Condensed Consolidated Financial Statements.

Acquisition of Vistar Media Inc.

Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on February 3, 2025, we completed the Vistar Acquisition, and as a result, Vistar became a wholly owned subsidiary of T-Mobile. In exchange, T-Mobile transferred cash of $621 million.

For more information regarding the Vistar Acquisition, see Note 2 – Business Combinations of the Notes to the Condensed Consolidated Financial Statements.

Acquisition of Blis Holdco Limited

Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on March 3, 2025, we completed the Blis Acquisition, and as a result, Blis became a wholly owned subsidiary of T-Mobile. In exchange, T-Mobile transferred cash of $180 million.

Table of Contents

For more information regarding the Blis Acquisition, see Note 2 – Business Combinations of the Notes to the Condensed Consolidated Financial Statements.

Off-Balance Sheet Arrangements

We have arrangements, as amended from time to time, to sell certain EIP accounts receivable and service accounts receivable on a revolving basis as a source of liquidity. As of March 31, 2025, we derecognized net receivables of $1.6 billion upon sale through these arrangements.

For more information regarding these off-balance sheet arrangements, see Note 5 – Sales of Certain Receivables of the Notes to the Condensed Consolidated Financial Statements.

Future Sources and Uses of Liquidity

We may seek additional sources of liquidity, including through the issuance of additional debt, to continue to opportunistically acquire spectrum licenses or other long-lived assets in private party transactions, make strategic investments, repurchase shares, pay dividends or for the refinancing of existing long-term debt on an opportunistic basis. Excluding liquidity that could be needed for acquisitions of businesses, spectrum and other long-lived assets, or for any potential stockholder returns, we expect our principal sources of funding to be sufficient to meet our anticipated liquidity needs for business operations for the next 12 months, as well as our longer-term liquidity needs. Our intended use of any such funds is for general corporate purposes, including for capital expenditures, spectrum purchases, opportunistic investments and acquisitions, redemption of debt, tower obligations, share repurchases, and dividend payments.

We determine future liquidity requirements for operations, capital expenditures, share repurchases and dividend payments based in large part upon projected financial and operating performance, and opportunities to acquire additional spectrum or repurchase shares. We regularly review and update these projections for changes in current and projected financial and operating results, general economic conditions, the competitive landscape and other factors. We have incurred, and will incur, substantial expenses to comply with the Government Commitments (as defined below), and we have incurred all of the remaining restructuring and integration costs associated with the Sprint Merger, with the cash expenditures for the Sprint Merger-related costs extending beyond 2024. There are a number of additional risks and uncertainties that could cause our financial and operating results and capital requirements to differ materially from our projections, which could cause future liquidity to differ materially from our assessment.

The indentures, supplemental indentures and credit agreements governing our long-term debt to affiliates and third parties, excluding financing leases, contain covenants that, among other things, limit the ability of the Issuers or borrowers and the Guarantor Subsidiaries to incur more debt, create liens or other encumbrances, and merge, consolidate or sell, or otherwise dispose of, substantially all of their assets. We were in compliance with all restrictive debt covenants as of March 31, 2025.

Financing Lease Facilities

We have uncommitted financing lease facilities with certain third parties that provide us with the ability to enter into financing leases for network equipment and services. We expect to enter into up to a total of $1.2 billion in financing lease commitments during the year ending December 31, 2025. As of March 31, 2025, we have entered into $10.2 billion of financing leases under these financing lease facilities, of which $243 million was executed during the three months ended March 31, 2025.

Capital Expenditures

Our liquidity requirements for capital expenditures have been driven primarily by capital expenditures for spectrum licenses, the construction, expansion and upgrading of our network infrastructure, the integration of the networks, spectrum, technology, personnel and customer base of T-Mobile and Sprint, which is substantially complete, and investments in information technology platforms. We expect to maintain our investment in capital expenditures related to these efforts in 2025 compared to 2024, as we continue to build out our nationwide 5G network and our digital transformation. Future capital expenditure requirements will be primarily driven by the deployment of acquired spectrum licenses.

For more information regarding our spectrum licenses, see Note6– Goodwill, Spectrum License Transactions and Other Intangible Assets of the Notes to the Condensed Consolidated Financial Statements.

Table of Contents

Stockholder Returns

On December 13, 2024, we announced that our Board of Directors authorized our 2025 Stockholder Return Program of up to $14.0 billion that will run through December 31, 2025. The 2025 Stockholder Return Program consists of repurchases of shares of our common stock and the payment of cash dividends. The declaration and payment of all dividends is subject to the discretion of our Board of Directors and will depend on financial and legal requirements and other considerations. The amount available under the 2025 Stockholder Return Program for share repurchases will be reduced by the amount of any cash dividends declared and paid by us.

The 2025 Stockholder Return Program is consistent with the Company’s capital allocation framework outlined during its Capital Markets Day in September 2024. As discussed at Capital Markets Day, the Company expects its business plan to support approximately $80.0 billion in investments and capital returns between September 18, 2024, and the end of 2027. The Company currently plans to allocate such funds as follows:

•Up to $50.0 billion for share repurchases and cash dividends, which includes the 2025 Stockholder Return Program;

•Approximately $19.0 billion in a discretionary and flexible envelope for potential activities, which may include de-levering, investments in our core business, strategic investments, and/or additional capital returns to stockholders beyond the $50.0 billion initial allocation; and

•Approximately $11.0 billion for announced transactions, including the acquisitions closed during the three months ended March 31, 2025. See Note 2 - Business Combinations, Note 3 - Joint Ventures and Note6– Goodwill, Spectrum License Transactions and Other Intangible Assets for additional information.

On November 21, 2024, our Board of Directors declared a cash dividend of $0.88 per share on our issued and outstanding common stock, which was paid on March 13, 2025, to stockholders of record as of the close of business on February 28, 2025.

On February 6, 2025, our Board of Directors declared a cash dividend of $0.88 per share on our issued and outstanding common stock, which will be paid on June 12, 2025, to stockholders of record as of the close of business on May 30, 2025.

During the three months ended March 31, 2025, we paid an aggregate of $1.0 billion in cash dividends to our stockholders, which was presented within Net cash provided by (used in) financing activities on our Condensed Consolidated Statements of Cash Flows. As of March 31, 2025, $993 million for dividends payable is presented within Other current liabilities on our Condensed Consolidated Balance Sheets.

During the three months ended March 31, 2025, we repurchased 10,091,227 shares of our common stock at an average price per share of $244.77 for a total purchase price of $2.5 billion under the 2025 Stockholder Return Program. As of March 31, 2025, we had up to $10.5 billion remaining under the 2025 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2025.

Subsequent to March 31, 2025, from April 1, 2025, through April 17, 2025, we repurchased 1,975,200 shares of our common stock at an average price per share of $259.09 for a total purchase price of $512 million under the 2025 Stockholder Return Program. As of April 17, 2025, we had up to $10.0 billion remaining under the 2025 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2025.

For additional information regarding the 2025 Stockholder Return Program, see Note 12– Stockholder Return Program of the Notes to the Condensed Consolidated Financial Statements.

Related Party Transactions

We have related party transactions associated with DT, SoftBank or their respective affiliates in the ordinary course of business, including intercompany servicing and licensing.

As of April 17, 2025, DT and SoftBank held, directly or indirectly, approximately 51.8% and 7.5%, respectively, of the outstanding T-Mobile common stock, with the remaining approximately 40.7% of the outstanding T-Mobile common stock held by other stockholders. As a result of the Proxy, Lock-Up and ROFR Agreement, dated April 1, 2020, by and between DT and SoftBank, DT has voting control, as of April 17, 2025, over approximately 59.0% of the outstanding T-Mobile common stock.

Table of Contents

Disclosure of Iranian Activities under Section 13(r) of the Exchange Act

Section 219 of the Iran Threat Reduction and the Syria Human Rights Act of 2012 added Section 13(r) to the Exchange Act. Section 13(r) requires an issuer to disclose in its annual or quarterly reports, as applicable, whether it or any of its affiliates knowingly engaged in certain activities, transactions or dealings relating to Iran or with designated natural persons or entities involved in terrorism or the proliferation of weapons of mass destruction. Disclosure is required even where the activities, transactions or dealings are conducted outside the U.S. by non-U.S. affiliates in compliance with applicable law, and whether or not the activities are sanctionable under U.S. law.

As of the date of this report, we are not aware of any activity, transaction or dealing by us or any of our affiliates for the three months ended March 31, 2025, that requires disclosure in this report under Section 13(r) of the Exchange Act, except as set forth below with respect to affiliates that we do not control and that are our affiliates solely due to their common control with either DT or SoftBank. We have relied upon DT and SoftBank for information regarding their respective activities, transactions and dealings.

DT, through certain of its non-U.S. subsidiaries, is party to roaming and interconnect agreements with the following mobile and fixed line telecommunication providers in Iran, some of which are or may be government-controlled entities: Irancell Telecommunications Services Company, Telecommunication Kish Company, Mobile Telecommunication Company of Iran, and Telecommunication Infrastructure Company of Iran. In addition, during the three months ended March 31, 2025, DT, through certain of its non-U.S. subsidiaries, provided basic telecommunications services to seven customers in Germany identified on the Specially Designated Nationals and Blocked Persons List maintained by the U.S. Department of Treasury’s Office of Foreign Assets Control: Bank Melli, Europäisch-Iranische Handelsbank, CPG Engineering & Commercial Services GmbH, Golgohar Trade and Technology GmbH, International Trade and Industrial Technology ITRITEC GmbH, The Airline of the Islamic Republic of Iran and Kara Industrial Trading GmbH. These services are in the process of being terminated, in particular by undertaking appropriate legal steps before German courts. For the three months ended March 31, 2025, gross revenues of all DT affiliates generated by roaming and interconnection traffic and telecommunications services with the Iranian parties identified herein were less than $0.1 million, and the estimated net profits were less than $0.1 million.

In addition, DT, through certain of its non-U.S. subsidiaries that operate a fixed-line network in their respective European home countries (in particular, Germany), provides telecommunications services in the ordinary course of business to the Embassy of Iran in those European countries. Gross revenues and net profits recorded from these activities for the three months ended March 31, 2025, were less than $0.1 million. We understand that DT intends to continue these activities.

Separately, SoftBank, through one of its non-U.S. subsidiaries, provides roaming services in Iran through Irancell Telecommunications Services Company. During the three months ended March 31, 2025, SoftBank had no gross revenues from such services, and no net profit was generated. We understand that the SoftBank subsidiary intends to continue such services. This subsidiary also provides telecommunications services in the ordinary course of business to accounts affiliated with the Embassy of Iran in Japan. During the three months ended March 31, 2025, SoftBank estimates that gross revenues and net profit generated by such services were both under $0.1 million. We understand that the SoftBank subsidiary is obligated under contract and intends to continue such services.

In addition, SoftBank, through one of its non-U.S. indirect subsidiaries, provides office supplies to the Embassy of Iran in Japan. SoftBank estimates that gross revenues and net profit generated by such services during the three months ended March 31, 2025, were both under $0.1 million. We understand that the SoftBank subsidiary intends to continue such activities.

Critical Accounting Estimates

Preparation of our condensed consolidated financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the reported amounts of certain assets, liabilities, revenues and expenses, as well as related disclosure of contingent assets and liabilities. There have been no material changes to the critical accounting policies and estimates as previously disclosed in Part II, Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2024, and which are hereby incorporated by reference herein.

Accounting Pronouncements Not Yet Adopted

For information regarding recently issued accounting standards, see Note 1 – Summary of Significant Accounting Policies of the Notes to the Condensed Consolidated Financial Statements.

Table of Contents

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are exposed to economic risks in the normal course of business, primarily from changes in interest rates, including changes in investment yields and changes in spreads due to credit risk, foreign currency exchange rate fluctuations and other factors. These risks, along with other business risks, impact our cost of capital. Our policy is to manage exposure related to fluctuations in interest rates in order to manage capital costs, control financial risks and maintain financial flexibility over the long term. We have established interest rate risk limits that are closely monitored by measuring interest rate sensitivities of our debt portfolio.

As of March 31, 2025, we held €4.8 billion in EUR-denominated Senior Notes, which are subject to foreign currency exchange rate fluctuations. We have entered into cross-currency swap agreements that qualify and have been designated as fair value hedges of our EUR-denominated debt, mitigating our exposure to foreign currency transaction gains and losses. We do not foresee significant changes in the strategies used to manage market risk in the near future.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures designed to ensure information required to be disclosed in our periodic reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Our disclosure controls include the use of a Disclosure Committee which is comprised of representatives from our Accounting, Legal, Treasury, Technology, Risk Management, Government Affairs and Investor Relations functions and are designed to ensure that information required to be disclosed in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

Under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, we carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective, as of the end of the period covered by this Form 10-Q.

The certifications required by Section 302 of the Sarbanes-Oxley Act of 2002 (the “Sarbanes-Oxley Act”) are filed as Exhibits 31.1 and 31.2 to this Form 10-Q.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act, during our most recently completed fiscal quarter that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. We are currently preparing to implement a new global enterprise resource planning (“ERP”) system, which will replace many of our operating and financial systems. The ERP system is designed to accurately maintain our financial records, support integrated billing, supply chain and other operational functionality, facilitate data analysis and accelerate information reporting to our management team related to the operation of the business. The implementation is expected to occur in phases over the next several years.

As the phased implementation of the new ERP system continues, we could have changes to our processes and procedures which, in turn, could result in changes to our internal control over financial reporting. As such changes occur, we will evaluate quarterly whether such changes materially affect our internal control over financial reporting.

Table of Contents

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

For more information regarding the legal proceedings in which we are involved, see Note 14– Commitments and Contingencies of the Notes to the Condensed Consolidated Financial Statements.

Item 1A. Risk Factors

Other than the updated risk factors below, there have been no material changes in our risk factors as previously disclosed in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024.

Any acquisition, divestiture, investment, joint venture or merger may subject us to significant risks, any of which may harm our business.

We may pursue acquisitions of, investments in, or joint ventures or mergers with, other companies, or the acquisition of technologies, services, products or other assets that we believe would complement or expand our business. We may also elect to divest some of our assets to third parties. Some of these potential transactions could be significant relative to the size of our business and operations. Any such transaction would involve a number of risks and could present financial, managerial and operational challenges, including:

•diversion of management attention from running our existing business;

•increased costs to integrate the networks, spectrum, technology, personnel, customer base, distributors and business partners and business practices of the company involved in any such transaction with our business;

•increased interest expense and leverage or limits on other uses of cash;

•potential loss of talent during integration due to differences in culture, locations, or other factors;

•difficulties in effectively integrating the financial, operational and sustainability systems of the business involved in any such transaction into (or supplanting such systems with) our financial, operational and sustainability reporting infrastructure and internal control framework in an effective and timely manner;

•risks of entering markets in which the Company has no or limited experience and where competitors have stronger market positions;

•to the extent any acquired business has any international operations, potential exposures to risks associated with maintaining and expanding such operations, including unfavorable and uncertain regulatory, political, economic, tax and labor conditions;

•potential exposure to material liabilities not discovered in the due diligence process or as a result of any litigation arising in connection with any such transaction;

•significant transaction-related expenses in connection with any such transaction, whether consummated or not;

•risks related to our ability to obtain any required regulatory approvals necessary to consummate any such transaction; and

•any business, technology, service, or product involved in any such transaction may significantly under-perform relative to our expectations, and we may not achieve the benefits we expect from the transaction, which could, among other things, also result in a write-down of goodwill and other intangible assets associated with such transaction.

We have entered into joint venture agreements aimed at establishing a robust fiber broadband network that complements our fixed wireless services. Once closed, differences in views among the joint venture participants may result in delayed decisions or disputes. Operating through joint ventures in which we do not hold a majority ownership interest results in us having limited control over many decisions made with respect to the businesses of the joint ventures. We also cannot control the actions of our joint venture partners. These joint ventures may not be subject to the same requirements regarding internal controls and internal control over financial reporting that we follow. As a result, internal control problems may arise with respect to these joint ventures. Any of these risks could have a material adverse effect on our business, financial condition and results of operations and could also affect our reputation.

Additionally, in connection with our Sprint Merger and related transactions, including the acquisition by DISH Network Corporation (“DISH”) of certain prepaid wireless business (the “Prepaid Transaction”), we agreed to fulfill various government commitments (the “Government Commitments”), including, among others, extensive 5G network build-out, delivering high-speed wireless services to the vast majority of Americans and marketing our in-home fixed wireless product to households

Table of Contents

where spectrum capacity is sufficient, as well as commitments related to national security, pricing and availability of rate plans. These Government Commitments materially increased our compliance obligations and could result in additional expenses and/or penalties in the future. In connection with the Prepaid Transaction, we and DISH entered into certain arrangements, including a Master Network Services Agreement (the “MNSA”), pursuant to which we provide DISH, for a period of seven years, network services for certain end users and infrastructure mobile network operator services to assist in the access and integration of the DISH network.

Any failure to fulfill our obligations under the Government Commitments and the MNSA in a timely manner could result in substantial fines, penalties, or other legal and administrative actions, liabilities, and reputational harm.

Economic, political and market conditions may adversely affect our business, financial condition, and operating results.

Our business, financial condition, and operating results are affected by changes in general economic conditions, including interest rates, consumer credit conditions, consumer debt levels, consumer confidence, unemployment rates, economic growth, tariffs and trade restrictions, fluctuations in global currencies, immigration policies, energy costs, rates of inflation (or concerns about deflation), supply chain disruptions, impacts of current geopolitical conflict or instability, such as the Ukraine-Russia and Israel-Hamas wars and further escalations thereof, and other macroeconomic factors.

The wireless industry, broadly, is dependent on population growth, including growth in the immigrant population. As a result, we expect the wireless industry’s customer growth rate to be moderate in comparison with historical growth rates, leading to ongoing competition for customers. In addition, the Government Commitments place certain limitations on our ability to increase prices, which limits our ability to pass along growing costs to customers. Rising prices for goods, services, and labor due to inflation, including inflation resulting from higher tariffs, restrictions and other economic disincentives to trade, could adversely impact our margins and/or growth.

Our services and device financing plans are available to a broad customer base, a significant segment of which may be vulnerable to weak economic conditions, particularly our subprime customers. We may have greater difficulty in gaining new customers within this segment, and existing customers may be more likely to terminate service and default on device financing plans due to an inability to pay.

Weak economic and credit conditions may also adversely impact our suppliers, dealers, wholesale partners or MVNOs, and enterprise and government customers, some of which may file for bankruptcy, or may experience cash flow or liquidity problems, or may be unable to obtain or refinance credit such that they may no longer be able to operate. Any of these could adversely impact our ability to distribute, market, or sell our products and services.

Changes to trade policies, including higher tariffs, restrictions and other economic disincentives to trade, may lead to operational delays, higher procurement and operational costs, and regulatory and compliance complexities, resulting in supply chain disruptions and higher prices and lower demand for devices and services we sell.

As a provider of telecommunications services, we depend on suppliers to provide us, directly or through other suppliers, with items such as equipment for our network, handsets, tablets, accessories, other mobile communication devices, other components and raw materials. Changes or proposed changes in U.S. or other countries’ trade policies that result in higher tariffs, restrictions and other economic disincentives to international trade may materially increase the costs we incur in developing, deploying and maintaining our network and offering products and services to our customers. A certain portion of the increased costs may be absorbed by certain suppliers, but some suppliers may struggle to absorb the increased costs, especially over the long term, potentially leading to supply disruptions or cost pass-throughs to us, which may lead to us increasing the prices we charge our customers. In addition, rapid changes in trade policies may negatively affect procurement timelines and supplier relationships and may introduce new compliance requirements. We may face potential delays in sourcing critical equipment due to customs clearance and supply chain bottlenecks, and material changes to cost structures could pressure our expenses and customer pricing.

Our attempts to mitigate potential disruptions to our supply chain and offset procurement and operational cost pressures, such as through alternative sourcing and/or increases in the selling prices of some of our products and services, may not be successful. Higher product or service prices for our customers may make it more difficult to attract new customers or cause increases in customer churn. Furthermore, we may not be able to offset any cost increases through productivity and cost-saving initiatives. To the extent that cost increases result in significant increases in our expenditures, or if our price increases are not sufficient to offset these increased costs adequately or in a timely manner, and/or if our revenues decrease, our business, financial condition or operating results may be adversely affected.

Table of Contents

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchases of Equity Securities

The table below provides information regarding our share repurchases during the three months ended March 31, 2025:

(in millions, except share and per share amounts)	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that may yet be Purchased Under the Plans or Programs (1)
January 1, 2025 - January 31, 2025	3,738,729	$	219.27	3,738,729	$	13,184
February 1, 2025 - February 28, 2025	3,222,490	257.63		3,222,490	12,354
March 1, 2025 - March 31, 2025	3,130,008	261.98		3,130,008	10,531
Total	10,091,227			10,091,227

(1)    On December 13, 2024, we announced that our Board of Directors authorized a stockholder return program for up to $14.0 billion that will run through December 31, 2025. The amounts presented represent the remaining dollar amount authorized for purchase under the 2025 Stockholder Return Program, as applicable, as of the end of the period, which has been reduced by the amount of any cash dividends declared and paid by the Company.

See Note 12– Stockholder Return Program of the Notes to the Condensed Consolidated Financial Statements for more information about our 2025 Stockholder Return Program.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

On February 20, 2025, Mark W. Nelson, the Company’s Executive Vice President and General Counsel, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell all of the shares of the Company’s common stock he will acquire on February 17, 2026, upon the vesting of certain time-based restricted stock unit awards and performance-based restricted stock unit awards (“PRSUs”), up to a total of 42,525 shares assuming PRSUs will vest at maximum value, subject to certain conditions. The duration of this trading plan is 372 days.

On March 4, 2025, Peter Osvaldik, the Company’s Chief Financial Officer, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell up to 10,000 shares of the Company’s common stock, subject to certain conditions. The duration of this trading plan is 336 days.

On March 6, 2025, Deeanne King, the Company’s Executive Vice President and Chief People Officer, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell up to 18,628 shares of the Company’s common stock, subject to certain conditions. The duration of this trading plan is 366 days.

On March 10, 2025, Jonathan Freier, the Company’s President, Consumer Group, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell up to 21,155 shares of the Company’s common stock, subject to certain conditions. The duration of this trading plan is 296 days.

Table of Contents

Item 6. Exhibits

		Incorporated by Reference
Exhibit No.	Exhibit Description	Form	Date of First Filing	Exhibit Number	Filed Herein
4.1	Twenty-Second Supplemental Indenture, dated as of February 11, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.150% Senior Note due 2032.	8-K	2/11/2025	4.2
4.2	Twenty-Third Supplemental Indenture, dated as of February 11, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.500% Senior Note due 2037.	8-K	2/11/2025	4.3
4.3	Twenty-Fourth Supplemental Indenture, dated as of February 11, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 3.800% Senior Note due 2045.	8-K	2/11/2025	4.4
4.4	Twenty-Fifth Supplemental Indenture, dated as of March 10, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee.	POSASR	3/24/2025	4.8
4.5	Twenty-Sixth Supplemental Indenture, dated as of March 27, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.125% Senior Note due 2032.	8-K	3/27/2025	4.2
4.6	Twenty-Seventh Supplemental Indenture, dated as of March 27, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.300% Senior Note due 2035.	8-K	3/27/2025	4.3
4.7	Twenty-Eighth Supplemental Indenture, dated as of March 27, 2025, by and among T-Mobile USA, Inc., the Guarantors (as defined therein) and Deutsche Bank Trust Company Americas, as trustee, including the Form of 5.875% Senior Note due 2055.	8-K	3/27/2025	4.4
4.8	Twenty-Fifth Supplemental Indenture, dated as of March 10, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee.				X
4.9	Fifty-First Supplemental Indenture, dated as of March 10, 2025, by and among T-Mobile USA, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee.				X
10.1*	Formof LTI AwardLetterAmendment				X
10.2*	Compensation Term Sheet, dated as of March 18, 2025, by and between T-Mobile US, Inc. and Michael J. Katz.				X
10.3	Guarantee Assumption Agreement, dated as of March 10, 2025, by and among Sprint Spectrum License Holder LLC, Sprint Spectrum License Holder II LLC, Sprint Spectrum License Holder III LLC and certain subsidiary guarantors.				X
22.1	Subsidiary Guarantors and Issuers of Guaranteed Securities.				X
31.1	Certifications of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.				X
31.2	Certifications of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.				X
32.1**	Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.				X
32.2**	Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.				X
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document.				X

Table of Contents

101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.	X
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.	X
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.	X
101.PRE	XBRL Taxonomy Extension Presentation Linkbase.	X
104	Cover Page Interactive Data File (the cover page XBRL tags)
*	Indicates a management contract or compensatory plan or arrangement.
---	---
**	Furnished herein.

Table of Contents

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	T-MOBILE US, INC.
April 24, 2025	/s/ Peter Osvaldik
	Peter Osvaldik
	Executive Vice President and Chief Financial Officer
	(Principal Financial Officer and Authorized Signatory)

58

Document

EXHIBIT 4.8

TWENTY-FIFTH SUPPLEMENTAL INDENTURE

TWENTY-FIFTH SUPPLEMENTAL INDENTURE (this “Twenty-Fifth Supplemental Indenture”), dated as of March 10, 2025, among T-Mobile USA, Inc. (the “Issuer”), the entities listed on Schedule I hereto (the “New Guarantors”), the existing guarantors signatory hereto (the “Existing Guarantors”) and Deutsche Bank Trust Company Americas, as trustee (the “Trustee”) under the Indenture referred to below.

WITNESSETH:

WHEREAS, the Issuer is party to the Indenture, dated as of April 9, 2020 (the “Base Indenture”) among the Issuer, T-Mobile US, Inc., a Delaware corporation, as a guarantor, and the Trustee, as amended and supplemented with respect to the Issuer’s (a) 3.500% Senior Secured Notes due 2025 by the First Supplemental Indenture dated as of April 9, 2020, (b) 3.750% Senior Secured Notes due 2027 by the Second Supplemental Indenture dated as of April 9, 2020, (c) 3.875% Senior Secured Notes due 2030 by the Third Supplemental Indenture dated as of April 9, 2020, (d) 4.375% Senior Secured Notes due 2040 by the Fourth Supplemental Indenture dated as of April 9, 2020, (e) 4.500% Senior Secured Notes due 2050 by the Fifth Supplemental Indenture dated as of April 9, 2020, (f) 1.500% Senior Secured Notes due 2026 by the Seventh Supplemental Indenture dated as of June 24, 2020, (g) 2.050% Senior Secured Notes due 2028 by the Eighth Supplemental Indenture dated as of June 24, 2020 and the Tenth Supplemental Indenture dated as of October 6, 2020, (h) 2.550% Senior Secured Notes due 2031 by the Ninth Supplemental Indenture dated as of June 24, 2020 and the Eleventh Supplemental Indenture dated as of October 6, 2020, (i) 3.000% Senior Secured Notes due 2041 by the Twelfth Supplemental Indenture dated as of October 6, 2020 and the Fifteenth Supplemental Indenture dated as of October 28, 2020, (j) 3.300% Senior Secured Notes due 2051 by the Thirteenth Supplemental Indenture dated as of October 6, 2020 and the Sixteenth Supplemental Indenture dated as of October 28, 2020, (k) 2.250% Senior Secured Notes due 2031 by the Fourteenth Supplemental Indenture dated as of October 28, 2020, (l) 3.600% Senior Secured Notes due 2060 by the Seventeenth Supplemental Indenture dated as of October 28, 2020 and the Twentieth Supplemental Indenture dated as of August 13, 2021, (m) 3.400% Senior Secured Notes due 2052 by the Nineteenth Supplemental Indenture dated as of August 13, 2021 and the Twenty-Third Supplemental Indenture dated as of December 6, 2021, (n) 2.400% Senior Notes due 2029 by the Twenty-First Supplemental Indenture dated as of December 6, 2021 and (o) 2.700% Senior Secured Notes due 2032 by the Twenty-Second Supplemental Indenture, dated as of December 6, 2021, and as amended and supplemented by the Eighteenth Supplemental Indenture dated as of March 30, 2021 and the Twenty-Fourth Supplemental Indenture dated as of May 21, 2024 (the Base Indenture as so amended and supplemented, the “Indenture”);

WHEREAS, Section 4.09 of the Indenture provides that under certain circumstances the Issuer is required to cause the New Guarantors to execute and deliver to the Trustee a supplemental indenture pursuant to which each of the New Guarantors shall become a Guarantor of the applicable Notes on the terms and conditions set forth herein; and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee, the Issuer, the Existing Guarantors and the New Guarantors are authorized to execute and deliver this Twenty-Fifth Supplemental Indenture.

NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Issuer, the New Guarantors, the Existing

Guarantors and the Trustee mutually covenant and agree for the benefit of the Holders of the applicable Notes as follows:

1.    Defined Terms. As used in this Twenty-Fifth Supplemental Indenture, capitalized terms used but not defined herein shall have the meaning set forth in the Indenture. The words “herein,” “hereof” and “hereby” and other words of similar import used in this Twenty-Fifth Supplemental Indenture refer to this Twenty-Fifth Supplemental Indenture as a whole and not to any particular section hereof.

2.    Agreement to Guarantee. The New Guarantors hereby agree, jointly and severally, to unconditionally guarantee, and the Existing Guarantors hereby affirm their joint and several unconditional guarantee of, the Issuer’s obligations under the Notes and the Indenture on the terms and subject to the conditions set forth in the Indenture including but not limited to ARTICLE X thereof.

3.    Notices. All notices or other communications to the Issuer and the New Guarantors shall be given as provided in Section 12.02 of the Indenture.

4.    Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly contemplated hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect.

5.    Governing Law. THIS TWENTY-FIFTH SUPPLEMENTAL INDENTURE WILL BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

6.    The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Twenty-Fifth Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the New Guarantors and the Issuer.

7.    Counterpart Originals. This Twenty-Fifth Supplemental Indenture may be executed in any number of counterparts and by the parties hereto in separate counterparts, each of which when so executed will be deemed to be an original and all of which taken together will constitute one and the same agreement. The exchange of copies of this Twenty-Fifth Supplemental Indenture and of signature pages by facsimile or electronic transmission shall constitute effective execution and delivery of this Twenty-Fifth Supplemental Indenture as to the parties hereto and may be used in lieu of the original Twenty-Fifth Supplemental Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or electronic transmission shall be deemed to be their original signatures for all purposes. The parties may sign any number of copies of this Twenty-Fifth Supplemental Indenture. Each signed copy will be an original, but all of them together represent the same agreement.

8.    Headings, etc. The headings of the Articles and Sections of this Twenty-Fifth Supplemental Indenture have been inserted for convenience of reference only, are not to be considered a part of this Twenty-Fifth Supplemental Indenture and will in no way modify or restrict any of the terms or provisions hereof.

[Signatures on following page]

IN WITNESS WHEREOF, the parties hereto have caused this Twenty-Fifth Supplemental Indenture to be duly executed, all as of the date first above written.

T-MOBILE USA, INC.

By:    /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

T-MOBILE US, INC.

By:    /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

ADSTRUC, LLC

BLIS USA, INC.

VISTAR MEDIA GLOBAL PARTNERS, LLC

VISTAR MEDIA INC., each as a Guarantor

By:    /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

[Twenty-Fifth Supplemental Indenture (2020 Indenture)]

APC REALTY AND EQUIPMENT COMPANY, LLC

ASSURANCE WIRELESS OF SOUTH CAROLINA, LLC

ASSURANCE WIRELESS USA, L.P.

ATI SUB, LLC

CLEARWIRE COMMUNICATIONS LLC

CLEARWIRE LEGACY LLC

CLEARWIRE SPECTRUM HOLDINGS II LLC

CLEARWIRE SPECTRUM HOLDINGS III LLC

CLEARWIRE SPECTRUM HOLDINGS LLC

FIXED WIRELESS HOLDINGS, LLC

IBSV LLC

METROPCS CALIFORNIA, LLC

METROPCS FLORIDA, LLC

METROPCS GEORGIA, LLC

METROPCS MASSACHUSETTS, LLC

METROPCS MICHIGAN, LLC

METROPCS NEVADA, LLC

METROPCS NEW YORK, LLC

METROPCS PENNSYLVANIA, LLC

METROPCS TEXAS, LLC

MINT MOBILE, LLC

MINT MOBILE INCENTIVE COMPANY, LLC

NEXTEL SYSTEMS, LLC

NEXTEL WEST CORP.

NSAC, LLC

PRWIRELESS PR, LLC

PUSHSPRING, LLC

SPRINT CAPITAL CORPORATION

SPRINT COMMUNICATIONS LLC

SPRINT LLC

SPRINT SOLUTIONS LLC

SPRINT SPECTRUM REALTY COMPANY, LLC

TDI ACQUISITION SUB, LLC

T-MOBILE CENTRAL LLC

T-MOBILE INNOVATIONS LLC

T-MOBILE LICENSE LLC

T-MOBILE NORTHEAST LLC

T-MOBILE PUERTO RICO HOLDINGS LLC

T-MOBILE PUERTO RICO LLC

T-MOBILE RESOURCES LLC

T-MOBILE SOUTH LLC

T-MOBILE WEST LLC TMUS INTERNATIONAL LLC

TVN VENTURES LLC, each as a Guarantor

By: /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

[Twenty-Fifth Supplemental Indenture (2020 Indenture)]

UVNV, LLC

VMU GP, LLC

WBSY LICENSING, LLC, each as a Guarantor

By: /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

SPRINTCOM LLC

SPRINT SPECTRUM LLC

T-MOBILE FINANCIAL LLC

T-MOBILE LEASING LLC, each as a Guarantor

By: /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Assistant Treasurer

[Twenty-Fifth Supplemental Indenture (2020 Indenture)]

BREEZE ACQUISITION SUB LLC, as a Guarantor

By: /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

[Twenty-Fifth Supplemental Indenture (2020 Indenture)]

DEUTSCHE BANK TRUST COMPANY AMERICAS, as Trustee

By:    /s/ Carol Ng     Name: Carol Ng Title: Vice President

By:    /s/ Chris Niesz     Name: Chris Niesz Title: Director

[Twenty-Fifth Supplemental Indenture (2020 Indenture)]

Schedule I

Entity	Jurisdiction of<br>Organization
ADSTRUC, LLC	Delaware
BLIS USA, INC.	Delaware
BREEZE ACQUISITION SUB LLC	Delaware
VISTAR MEDIA GLOBAL PARTNERS, LLC	New York
VISTAR MEDIA INC.	Delaware

I-1

Document

EXHIBIT 4.9

FIFTY-FIRST SUPPLEMENTAL INDENTURE

FIFTY-FIRST SUPPLEMENTAL INDENTURE (this “Fifty-First Supplemental Indenture”), dated as of March 10, 2025, among T-Mobile USA, Inc. (the “Company”), the entities listed on Schedule I hereto (the “New Guarantors”), the existing guarantors signatory hereto (the “Existing Guarantors”) and Deutsche Bank Trust Company Americas, as trustee under the Indenture referred to below (the “Trustee”).

WITNESSETH:

WHEREAS, the Company has heretofore executed and delivered to the Trustee an Indenture, dated as of April 28, 2013 (the “Base Indenture”) as amended and supplemented with respect to the Company’s (a) 5.375% Senior Notes due 2027 pursuant to the Twenty-Fifth Supplemental Indenture dated as of March 16, 2017, (b) 4.750% Senior Notes due 2028 pursuant to the Thirty-Third Supplemental Indenture dated as of January 25, 2018, (c) 4.750% Senior Notes due 2028-1 pursuant to the Thirty-Sixth Supplemental Indenture dated as of April 30, 2018, (d) 2.250% Senior Notes due 2026 pursuant to the Forty-Third Supplemental Indenture dated as of January 14, 2021, (e) 2.625% Senior Notes due 2029 pursuant to the Forty-Fourth Supplemental Indenture dated as of January 14, 2021, (f) 2.875% Senior Notes due 2031 pursuant to the Forty-Fifth Supplemental Indenture dated as of January 14, 2021, (g) 2.625% Senior Notes due 2026 pursuant to the Forty-Sixth Supplemental Indenture dated as of March 23, 2021, (h) 3.375% Senior Notes due 2029 pursuant to the Forty-Seventh Supplemental Indenture dated as of March 23, 2021 and (i) 3.500% Senior Notes due 2031 pursuant to the Forty-Eighth Supplemental Indenture dated as of March 23, 2021, and as amended and supplemented by the Eleventh Supplemental Indenture dated as of May 1, 2013, the Sixteenth Supplemental Indenture dated as of August 11, 2014, the Nineteenth Supplemental Indenture dated as of September 28, 2015, the Thirty-Fourth Supplemental Indenture dated as of April 26, 2018, the Thirty-Seventh Supplemental Indenture dated as of May 20, 2018, the Thirty-Eighth Supplemental Indenture dated as of December 20, 2018, the Fortieth Supplemental Indenture, dated as of September 27, 2019, the Forty-First Supplemental Indenture, dated as of April 1, 2020, the Forty-Ninth Supplemental Indenture dated as of March 30, 2021 and the Fiftieth Supplemental Indenture, dated as of May 21, 2024 (the Base Indenture as so amended and supplemented, the “Indenture”);

WHEREAS, Section 4.17 of the Indenture provides that under certain circumstances the Company is required to cause the New Guarantors to execute and deliver to the Trustee a supplemental indenture pursuant to which each of the New Guarantors shall become a Guarantor of the applicable Notes on the terms and conditions set forth herein; and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee, the Company, the Existing Guarantors and the New Guarantors are authorized to execute and deliver this Fifty-First Supplemental Indenture.

NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Company, the New Guarantors, the Existing Guarantors and the Trustee mutually covenant and agree for the benefit of the Holders of the applicable Notes as follows:

1.    Defined Terms. As used in this Fifty-First Supplemental Indenture, capitalized terms used but not defined herein shall have the meaning set forth in the Indenture. The words “herein,”

“hereof” and “hereby” and other words of similar import used in this Fifty-First Supplemental Indenture refer to this Fifty-First Supplemental Indenture as a whole and not to any particular section hereof.

2.    Agreement to Guarantee. The New Guarantors hereby agree, jointly and severally, to unconditionally guarantee, and the Existing Guarantors hereby affirm their joint and several unconditional guarantee of, the Company’s obligations under the Notes and the Indenture on the terms and subject to the conditions set forth in the Indenture including but not limited to ARTICLE X thereof.

3.    Notices. All notices or other communications to the Company and the New Guarantors shall be given as provided in Section 12.02 of the Indenture.

4.    Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly contemplated hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect.

5.    Governing Law. THIS FIFTY-FIRST SUPPLEMENTAL INDENTURE WILL BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

6.    The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Fifty-First Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the New Guarantors and the Company.

7.    Counterpart Originals. This Fifty-First Supplemental Indenture may be executed in any number of counterparts and by the parties hereto in separate counterparts, each of which when so executed will be deemed to be an original and all of which taken together will constitute one and the same agreement. The exchange of copies of this Fifty-First Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Fifty-First Supplemental Indenture as to the parties hereto and may be used in lieu of the original Fifty-First Supplemental Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF transmission shall be deemed to be their original signatures for all purposes. The parties may sign any number of copies of this Fifty-First Supplemental Indenture. Each signed copy will be an original, but all of them together represent the same agreement.

8.    Headings, etc. The headings of the Articles and Sections of this Fifty-First Supplemental Indenture have been inserted for convenience of reference only, are not to be considered a part of this Fifty-First Supplemental Indenture and will in no way modify or restrict any of the terms or provisions hereof.

[Signatures on following page]

IN WITNESS WHEREOF, the parties hereto have caused this Fifty-First Supplemental Indenture to be duly executed, all as of the date first above written.

T-MOBILE USA, INC.

By: /s/ Johannes Thorsteinsson     Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

T-MOBILE US, INC.

By: /s/ Johannes Thorsteinsson     Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

ADSTRUC, LLC

BLIS USA, INC.

VISTAR MEDIA GLOBAL PARTNERS, LLC

VISTAR MEDIA INC., each as a Guarantor

By: /s/ Johannes Thorsteinsson     Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

[Fifty-First Supplemental Indenture]

APC REALTY AND EQUIPMENT COMPANY, LLC

ASSURANCE WIRELESS OF SOUTH CAROLINA, LLC

ASSURANCE WIRELESS USA, L.P.

ATI SUB, LLC

CLEARWIRE COMMUNICATIONS LLC

CLEARWIRE LEGACY LLC

CLEARWIRE SPECTRUM HOLDINGS II LLC

CLEARWIRE SPECTRUM HOLDINGS III LLC

CLEARWIRE SPECTRUM HOLDINGS LLC

FIXED WIRELESS HOLDINGS, LLC

IBSV LLC

METROPCS CALIFORNIA, LLC

METROPCS FLORIDA, LLC

METROPCS GEORGIA, LLC

METROPCS MASSACHUSETTS, LLC

METROPCS MICHIGAN, LLC

METROPCS NEVADA, LLC

METROPCS NEW YORK, LLC

METROPCS PENNSYLVANIA, LLC

METROPCS TEXAS, LLC

MINT MOBILE, LLC

MINT MOBILE INCENTIVE COMPANY, LLC

NEXTEL SYSTEMS, LLC

NEXTEL WEST CORP.

NSAC, LLC

PRWIRELESS PR, LLC

PUSHSPRING, LLC

SPRINT CAPITAL CORPORATION

SPRINT COMMUNICATIONS LLC

SPRINT LLC

SPRINT SOLUTIONS LLC

SPRINT SPECTRUM REALTY COMPANY, LLC

TDI ACQUISITION SUB, LLC

T-MOBILE CENTRAL LLC

T-MOBILE INNOVATIONS LLC

T-MOBILE LICENSE LLC

T-MOBILE NORTHEAST LLC

T-MOBILE PUERTO RICO HOLDINGS LLC

T-MOBILE PUERTO RICO LLC

T-MOBILE RESOURCES LLC

T-MOBILE SOUTH LLC

T-MOBILE WEST LLC TMUS INTERNATIONAL LLC

TVN VENTURES LLC, each as a Guarantor

By: /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

[Fifty-First Supplemental Indenture]

UVNV, LLC

VMU GP, LLC

WBSY LICENSING, LLC, each as a Guarantor

By: /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

SPRINTCOM LLC

SPRINT SPECTRUM LLC

T-MOBILE FINANCIAL LLC

T-MOBILE LEASING LLC, each as a Guarantor

By: /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Assistant Treasurer

[Fifty-First Supplemental Indenture]

BREEZE ACQUISITION SUB LLC, as a Guarantor

By: /s/ Johannes Thorsteinsson

Name: Johannes Thorsteinsson

Title: Senior Vice President, Treasury & Treasurer

[Fifty-First Supplemental Indenture]

DEUTSCHE BANK TRUST COMPANY AMERICAS, as Trustee

By: /s/ Carol Ng     Name: Carol Ng Title: Vice President

By: /s/ Chris Niesz     Name: Chris Niesz Title: Director

[Fifty-First Supplemental Indenture]

Schedule I

Entity	Jurisdiction of<br>Organization
ADSTRUC, LLC	Delaware
BLIS USA, INC.	Delaware
BREEZE ACQUISITION SUB LLC	Delaware
VISTAR MEDIA GLOBAL PARTNERS, LLC	New York
VISTAR MEDIA INC.	Delaware

I-1

Document

EXHIBIT 10.1

T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, WA 98006-1350

March __, 2025

[Name]

c/o T-Mobile US, Inc.

12920 SE 38th Street

Bellevue, WA 98006-1350

Re: Amendment to Outstanding Equity Awards

Dear [Name]:

As you know, you currently hold certain time-based restricted stock unit (“RSU”) and performance-based restricted stock unit (“PRSU”) awards covering shares of T-Mobile US, Inc. (the “Company”) common stock (the “Awards”), which were issued to you pursuant to the T-Mobile US, Inc. 2023 Incentive Award Plan, the Sprint Corporation Amended and Restated 2015 Omnibus Incentive Plan and/or the T-Mobile US, Inc. 2013 Omnibus Incentive Plan (together, the “Plans”) and award agreements between you and the Company, which evidence the grant of such Awards (the “Award Agreements”).

We are pleased to inform you that the Company has approved an amendment to your Awards as described below in this letter (this “Letter”). Capitalized terms used in this Letter have the meanings set forth in the applicable Plan or the applicable Award Agreement.

1.Qualifying Termination. Notwithstanding anything to the contrary in your Award Agreements, if you incur a Termination of Service as a result of a Qualifying Termination (as defined on Exhibit A hereto), then subject to Section 2 below:

(a)any then-outstanding and unvested RSUs that are otherwise scheduled to become vested upon the next scheduled Vesting Date shall vest upon such Termination of Service; and

(b)with respect to any then-outstanding and unvested performance-vesting RSUs (“PRSUs”), (i) the number of Performance-Adjusted Units shall be determined (in accordance with the applicable Award Agreement) as soon as administratively practicable following the last day of the Performance Period, (B) a number of PRSUs equal to the product of such Performance-Adjusted Units multiplied by the Pro Rata Fraction shall become earned and vested and (C) any remaining unearned PRSUs shall be canceled and forfeited effective as of the last day of the Performance Period.

2.Release Requirement. You will not be eligible to receive any vesting or accelerated vesting of your Awards under Section 1(a) or 1(b) above unless you execute and, if applicable, do not revoke all documents required under the applicable Company severance program or otherwise, including without limitation any required release of claims, within the applicable time frames set forth in such documents or as prescribed by the Company (which, in either case, shall be no later than sixty (60) days following the date of such Termination of Service). In the event you fail to execute all required

documents in a timely fashion, then if any RSUs or PRSUs have vested or been paid to you after your Termination of Service but before your failure to execute all required documents, you covenant and agree that you will have no right, title or interest in such amount vested or paid and that you will cause such amount to be returned immediately to the Company upon notice.

3.No Other Modifications. Except as specifically set forth in this Letter, all other terms and conditions of your Awards and the Award Agreements shall remain unchanged and in full force and effect.

4.No Tax Advice. The Company is not making any warranties or representations to you with respect to the income tax consequences associated with this Letter and you are in no manner relying on the Company, its affiliates or any of their respective representatives for an assessment of such tax consequences. You are hereby advised to consult with your own tax advisor with respect to any tax consequences associated with this Letter.

5.Miscellaneous. This Letter, together with your Award Agreements and the applicable Plans, sets forth the final and entire agreement of you and the Company with respect to the subject matter hereof. This Letter may be amended only in a writing signed by you and an authorized officer of the Company. This Letter may be executed in one or more counterparts, each of which will be deemed to be an original but all of which together will constitute one and the same instrument. This Letter shall be governed by and construed in accordance with the laws of the State of Delaware without giving effect to the principles of conflicts of laws, and applicable federal law. Nothing contained in this Letter shall confer upon you any right to continue in the employ or service of the Company or its affiliates or affect the right of the Company or its affiliates to terminate your employment or service at any time.

Please indicate your acknowledgment of, and agreement to, the terms and conditions set forth in this Letter by signing and dating this Letter in the space below and returning a signed copy to Deeanne King, Chief People Officer.

[Signature page follows]

|

Sincerely,

T-Mobile US, Inc.

By: /s/ Deeanne King_______________________

Name: Deeanne King

Title: EVP, Chief People Officer

Acknowledged, Agreed and Accepted:

________________________________

Name: __________________________

Date: ___________________________

|

Exhibit A

Definitions

(i)“Cause” means “Cause” (or any term of similar effect) as defined in your offer letter or other applicable employment or service agreement with the Company or any of its Affiliates or, if there is no such agreement or such agreement does not contain a definition of Cause (or term of similar effect), then “Cause” shall mean any one or more of the following: (A) your gross neglect or willful material breach of your principal employment responsibilities; (B) a final judicial adjudication that you are guilty of any felony (other than a law, rule or regulation relating to a traffic violation or other similar offense that has no material, adverse effect on the Company, Deutsche Telekom AG or their respective Affiliates); (C) your breach of any written non-competition, non-solicitation or confidentiality covenant between you and the Company or any Affiliate of the Company (other than a de minimis breach); (D) fraudulent conduct in the course of your employment with the Company as determined by a court of competent jurisdiction; (E) your unlawful discrimination, harassment, or retaliation, assault or other violent act toward any employee or third party, or other act or omission, in each case that in the reasonable and good faith view of the Board constitutes a material breach of the Company’s or one of its Affiliate’s written policies or Code of Conduct; or (F) your material breach of any other obligation which, if reasonably curable, continues uncured for a period of thirty (30) days after notice thereof by the Company or any of its Affiliates and which is demonstrably injurious to the Company or an Affiliate thereof. Notwithstanding the foregoing, no cure period shall be required under the foregoing clause (F) if the breach is a recurrence of conduct that was the subject of a prior notice under such clause (F) for which a thirty (30)-day cure period was given. For purposes of the foregoing clause (F), the term “obligation” refers to the Company’s (and its Affiliates’) policies and directives and is not intended to refer to performance expectations such as goals set forth in bonus plans or performance evaluations

(ii) “Good Reason” means “Good Reason” (or any term of similar effect) as defined in your offer letter or other applicable employment or service agreement with the Company or any of its Affiliates or, if there is no such agreement or such agreement does not contain a definition of Good Reason (or term of similar effect), then “Good Reason” shall mean the occurrence of any of the following events without your consent, provided that (x) you notify the Company not more than ninety (90) days after its initial occurrence, (b) the Company does not cure such occurrence within thirty (30) days after receipt of such notice and (c) your employment with the Company terminates within sixty (60) days after the end of the Company’s cure period: (A) a material reduction in your base salary, annual target short-term incentive award opportunity or annual target long-term incentive opportunity, except for across-the-board salary reductions based on the Company’s and its Affiliates’ financial performance similarly affecting all or substantially all management employees of the Company and its Affiliates; or (B) the relocation of the office at which you are principally employed to a location more than fifty (50) miles from the location of such office, or you being required to be based anywhere other than such office, except for required travel on business.

(iii)“Qualifying Termination” means your Termination of Service (A) by the Company without Cause or (B) by you for Good Reason.

|

Document

EXHIBIT 10.2

T-MOBILE US, INC.

COMPENSATION TERM SHEET

FOR

MICHAEL J. KATZ

This Compensation Term Sheet (the “Term Sheet”) between Michael J. Katz (“you”) and T-Mobile US, Inc. (the “Company”), effective as of March 18, 2025 (the “Effective Date”), confirms our understanding and agreement about your role and certain compensation opportunities with the Company following the Effective Date.

Term	Your employment with the Company under this Term Sheet is “at will” and is not for a specified period of time, meaning that it may be terminated by you or the Company, for any reason or for no reason whatsoever, with or without notice and with or without cause (the period of your employment with the Company under this Term Sheet, the “Term”). The at-will nature of your employment relationship cannot be changed other than by a written agreement signed by you and a duly authorized Company officer.
Position	During the Term, you will initially serve as President, Marketing, Strategy and Products of the Company. You will have such duties and authority as are commensurate with your position and you will perform such duties commensurate with such position as your supervisor may from time to time assign. You will continue to devote your full professional time, attention and energies to the business of the Company. Notwithstanding the foregoing, provided it does not interfere with your obligations to the Company, you may (a) with the prior approval of the Company’s Chief Executive Officer, serve as a director or trustee, or in a similar capacity, in connection with service to for profit and not-for-profit entities, including industry associations, that do not compete, directly or indirectly, with the Company and its affiliates and (b) manage your personal investments. Your position will continue to be based in Bellevue, WA.
Compensation	During the Term, your compensation will be as follows:
	Salary:
	•You will receive an annual base salary (the “Base Salary”) of no less than $975,000 (pro-rated for any partial year of employment), payable in accordance with the Company’s standard payroll practices (but no less often than monthly). Without limiting the foregoing, effective commencing with the first payroll period for each calendar year commencing during the Term (commencing with calendar year 2026 and measured as of January 1st of the applicable calendar year), your Base Salary for such calendar year will be set by the Compensation Committee of the Board of Directors of the Company (the “Board”) or the Section 16 Subcommittee thereof (collectively, the “Committee”) to the greater of (i) the 50th percentile of the then-current annual base salary for the most highly compensated executive officer role (excluding Chief Executive Officers, Chief Financial Officers and, if applicable, Executive Chairs) in the Company’s then-current peer group utilized by the Committee for executive compensation decisions (as determined by the Committee) or (ii) the Base Salary in effect for the immediately preceding calendar year, subject to your continued employment through the date of the applicable increase.
	Short-Term Incentive (“STI”):
---	---
	•For each calendar year commencing after the Effective Date during the Term, your annual STI target award opportunity (the “Target STI”) will be no less than 200% of your eligible annual earnings for the applicable calendar year.
	•STI awards will continue be based on the achievement of Company goals (and, as applicable, individual performance) as determined by the Committee that are no less favorable than those applicable to the STI awards granted to the Company’s other executive-level employees.
	Long-Term Incentive (“LTI”):
	•For each calendar year commencing after the Effective Date during the Term, you will receive annual LTI awards with an aggregate target grant-date value (the “Target LTI”) of no less than $8,575,000. Without limiting the foregoing, effective for long-term incentive grants made during calendar year 2026 and each subsequent calendar year, your Target LTI for such calendar year will be set to the greater of (i) the 50th percentile of the then-current target grant date value of annual equity incentive awards for the most highly compensated executive officer role (excluding Chief Executive Officers, Chief Financial Officers and, if applicable, Executive Chairs) in the Company’s then-current peer group utilized by the Committee for executive compensation decisions (as determined by the Committee) or (ii) your Target LTI in effect for the immediately preceding calendar year, subject to your continued employment through the applicable date grant.
	•LTI awards will continue to be made in such form and on such terms as the Committee may determine that are no less favorable than those applicable to the LTI awards granted to the Company’s other executive-level employees (excluding, for clarity, any such terms relating to the accelerated vesting of such awards on qualifying terminations of employment). Each LTI award will be subject to the terms and conditions of the Company’s 2023 Incentive Award Plan (as amended or superseded from time to time, the “Plan”) and an award agreement prescribed by the Company, which shall evidence the grant of the LTI award.
	•Notwithstanding the foregoing, no LTI awards will be granted to you during the period commencing on the date on which either you or the Company provides notice of the termination of your employment for any reason and ending on the date on which your employment terminates; provided, however, that such notice shall not be deemed to have been given any earlier than ninety (90) days prior to the date on which your employment terminates.
Termination	Your employment with the Company may be terminated at any time (i) by the Company with or without Cause or due to you becoming disabled or (ii) by you for or without Good Reason (each such term as defined in Attachment A). Your employment with the Company will automatically terminate upon your death.

• 2 -

Severance	If your employment is terminated (i) by the Company without Cause (and other than due to your death or you becoming disabled) or (ii) by you for Good Reason, in either case, during the Term, then, subject to the satisfaction of the requirements described in the paragraph immediately following subsection (g) below, you will receive the following payments and benefits from the Company:
	(a)     An amount equal to two (2) times the sum of (i) your then-current Base Salary plus (ii) your then-current Target STI award, payable in a single lump-sum amount within seventy-four (74) days following the date of such termination of employment (the “Termination Date”);
	(b)     A pro-rata STI award for the calendar year in which the Termination Date occurs, based on the number of days in such calendar year through the Termination Date divided by 365 (or 366, as applicable) and based on actual performance results for such calendar year, payable no later than March 15th of the calendar year following the calendar year in which your employment terminates;
	(c)     Any earned, unpaid STI award for the calendar year ending immediately prior to the calendar year in which the Termination Date occurs, payable in a single lump-sum amount within seventy-four (74) days following the Termination Date;
	(d)     For any outstanding LTI award that is not subject to any performance vesting condition as of the Termination Date (each, a “Time-Based Award”), upon your Termination Date, you will vest in that number of shares or units (as applicable) subject to such Time-Based Award that would otherwise vest on the next scheduled vesting date to occur following such termination. Any portion of a Time-Based Award that is unvested as of the Termination Date (after taking into account the accelerated vesting in the preceding sentence) shall be immediately canceled as of the Termination Date;
	(e)     For any outstanding LTI award that is subject to any performance vesting condition as of the Termination Date (each, a “Performance Award”), such Performance Award will remain outstanding through the conclusion of the applicable performance period and, subject to and conditioned upon the satisfaction of the applicable performance conditions, will vest based on the level of achievement of such performance conditions during the performance period, and the actual number of shares or units (as applicable) subject to such Performance Award that will become earned and vested upon or following the conclusion of the performance period (an “Earned Award”) shall be equal to the product of (i) the total number of shares or units (as applicable) subject to the award that would, absent your termination, otherwise become earned and vested based on the level of achievement of the applicable performance conditions during such performance period and (ii) a fraction, the numerator of which is the number of days from the applicable grant date to the Termination Date and the denominator of which is the number of days from the grant date to the applicable vesting date of the Earned Award. Any Earned Award (or portion thereof) shall be payable following the performance period at the same time as such Performance Award would otherwise be payable to you under the applicable award agreement had your employment not terminated (unless subject to any deferral of earned and vested awards elected by you in accordance with the terms of the applicable LTI award agreement(s), in which case such deferral shall dictate payment timing). Any portion of a Performance Award that does not become an Earned Award shall be immediately canceled as of the end of the applicable performance period;

• 3 -

(f)     During the period commencing on the Termination Date and ending on the earlier of the end of the eighteenth (18th) full calendar month following the Termination Date or the date on which you become eligible for coverage under a subsequent employer’s group medical and dental plans (in either case, the “COBRA Period”), subject to your valid election to continue healthcare coverage under Section 4980B of the Internal Revenue Code of 1986, as amended (the “Code”), and the regulations thereunder, the Company will continue to provide to you and your dependents, at the Company’s sole cost, coverage under its group medical and dental plans at the same levels in effect on the Termination Date; provided, however, that if (i) any plan pursuant to which such benefits are provided is not, or ceases prior to the expiration of the continuation coverage period to be, exempt from the application of Section 409A (as defined below) under Treasury Regulation Section 1.409A-1(a)(5), (ii) the Company is otherwise unable to continue to cover you or your dependents under its group health plans, or (iii) the Company cannot provide the benefit without violating applicable law (including, without limitation, Section 2716 of the Public Health Service Act), then, in any such case, an amount equal to the dollar value of the balance of the Company’s subsidy shall thereafter be paid to you in substantially equal, then-currently-taxable monthly installments over the COBRA Period (or remaining portion thereof); and
(g)     Continued eligibility, following the Termination Date, for the Company’s employee mobile service discount program, in accordance with the terms of such program as in effect from time to time following the Termination Date.
As a condition to your receipt of any severance payments and benefits described above (collectively, the “Severance Benefits”), (i) you must execute and deliver to the Company a release of all claims substantially in the form attached hereto as Attachment B (as may be updated by the Company to the extent necessary to reflect changes in law, the “Release”), and such Release must become fully effective (including, without limitation, the expiration of any revocation period), no later than sixty (60) days following the Termination Date, and (ii) you must continue to comply with the terms and conditions of the Restrictive Covenant Agreement (as defined below).
During the Term, and notwithstanding anything to the contrary in any other plan, program or arrangements maintained by the Company, you will not be eligible to participate in any other severance program or policy maintained by the Company in which you are, immediately prior to the commencement of the Term, or would otherwise be during the Term, eligible to participate; provided, however, that, during the Term, (i) you will remain eligible, under the severance program or policy maintained by the Company for its other executive-level officers in effect at the time of your termination of employment with the Company (the “Severance Policy”) (and subject to the terms and conditions of such Severance Policy), for Company-subsidized group medical and dental coverage under Section 4980B of the Code and Company-paid outplacement services (and, for clarity, not for any other payments or benefits under the Severance Policy) (the benefits in this clause (i), the “COBRA/Outplacement Benefits”), (ii) you will remain eligible to participate in the Executive Continuity Plan and (iii) your STI and LTI awards will remain eligible to vest on an accelerated basis in connection with a Change in Control (as defined in the Plan, or any successor plan) (including, for the avoidance of doubt, in connection with a termination of your employment by the Company without Cause or by you for Good Reason in connection with a Change in Control) pursuant to the Plan and your STI and LTI award agreements (the benefits in this clause (iii), the “CIC STI/LTI Award Acceleration”), subject to the following paragraph.

• 4 -

	If your employment terminates during the Term in a manner that results in your receipt of the Severance Benefits and, in connection with such termination of employment, you are also eligible to receive severance payments and benefits under the Executive Continuity Plan, the Severance Policy (solely with respect to the COBRA/Outplacement Benefits), and the CIC STI/LTI Award Acceleration (together, the “CIC Benefits”), then (subject to your satisfaction of any applicable conditions to the receipt thereof) the Company will provide you with either the Severance Benefits or the CIC Benefits (whichever have a greater aggregate value to you, as determined by the Company in consultation with you). For example, if you are eligible for CIC Benefits in connection with a termination of employment following a Change in Control under the Executive Continuity Plan, the Severance Policy (solely with respect to the COBRA/Outplacement Benefits), the Plan and your STI and LTI award agreements (as applicable), and the aggregate value of such CIC Benefits is greater than the aggregate value of the Severance Benefits that you would be eligible to receive under this Term Sheet (as determined by the Company), then you would be eligible to receive the CIC Benefits instead of the Severance Benefits under this Term Sheet.
Death; Disability	If your employment terminates due to your death or due to a termination by the Company due to your Disability (as that term is defined in the Plan), in either case, during the Term, then, subject to the satisfaction of the requirements described in the paragraph immediately following subsection (c) below, you (or your estate, as applicable) will receive the following payments and benefits from the Company:
	(a)     The Target STI award for the calendar year in which the Termination Date occurs, payable no later than seventy-four (74) days following the Termination Date;
	(b)     Any earned, unpaid STI award for the calendar year ending immediately prior to the calendar year in which the Termination Date occurs, payable in a single lump-sum amount within seventy-four (74) days following the Termination Date; and
	(c)     Vesting of any LTI awards that are outstanding as of the Termination Date shall be determined under and in accordance with the terms of the Plan and applicable award agreement, which terms shall be no less favorable than applicable to all other “executive officers” of the Company (as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934).
	As a condition to your (or your estate’s) receipt of any payments and benefits described above, (i) you (or your estate, as applicable) must execute and deliver to the Company the Release and such Release must become fully effective (including, without limitation, the expiration of any revocation period), no later than sixty (60) days following the Termination Date, and (ii) if applicable, you must continue to comply with the terms and conditions of the Restrictive Covenant Agreement.
Code Sections	The payments and benefits described in this Term Sheet are intended to comply with or be exempt from Section 409A of the Internal Revenue Code of 1986, as amended (“Section 409A”). See Attachment C, which is hereby incorporated into this Term Sheet, for additional details. In addition, you acknowledge and agree that the payments and benefits described in this Term Sheet (in addition to any other payments and benefits payable to you by the Company or any affiliate thereof) may be subject to reduction as set forth on Attachment D, which is hereby incorporated into this Term Sheet.

• 5 -

Successors	This Term Sheet is personal to you and, without the prior written consent of the Company, shall not be assignable by you other than by will or the laws of descent and distribution. This Term Sheet shall inure to the benefit of and be binding upon the Company and its successors and assigns.
Withholding	All compensation and other benefits payable to or on behalf of you pursuant to this Term Sheet shall be subject to such deductions and withholdings as may be agreed to by you or required by applicable law, rule or regulation or Company policy.
Clawback	You acknowledge and agree that any incentive compensation provided by the Company to you under this Term Sheet or otherwise may be subject to recovery by the Company under and in accordance with any Company clawback or recoupment policy in effect on the Effective Date or as may be adopted or maintained by the Company following the Effective Date, including the Company’s Amended and Restated Executive Incentive Compensation Recoupment Policy as adopted October 2, 2023, as amended from time to time (or any successor policy thereto).
Covenants	You acknowledge and agree that you have previously entered into a T-Mobile US, Inc. Restrictive Covenant, Intellectual Property Ownership and Assignment, and Confidentiality Agreement with the Company (the “Restrictive Covenant Agreement”), a copy of which is attached hereto as Attachment E, and you agree to continue to be bound by and comply with the terms and conditions of such Restrictive Covenant Agreement. Notwithstanding any provision of the Restrictive Covenant Agreement to the contrary, you understand that nothing contained herein or in the Restrictive Covenant Agreement is intended to or will prohibit you from (i) filing a charge with, reporting possible violations of federal law or regulation to, participating in any investigation by, or cooperating with any federal, state or local governmental agency or entity or making other disclosures that are protected under the whistleblower provisions of applicable law or regulation; (ii) communicating directly with, cooperating with, or providing information (including trade secrets) to, or receiving financial awards from, any federal, state or local government agency (including, but not limited to, the U.S. Securities and Exchange Commission, the U.S. Commodity Futures Trading Commission, the U.S. Department of Justice, the U.S. Equal Employment Opportunity Commission or the U.S. National Labor Relations Board); (iii) exercising any rights you may have under Section 7 of the U.S. National Labor Relations Act, such as the right to engage in concerted activity, including collective action or discussion concerning wages or working conditions; and (iv) discussing or disclosing information about unlawful acts in the workplace, such as harassment or discrimination based on a protected characteristic or any other conduct that you have reason to believe is unlawful.
	Notwithstanding any provision of the Restrictive Covenant Agreement to the contrary, you understand that pursuant to 18 USC Section 1833(b), (1) you will not be held criminally or civilly liable under any federal or state trade secret law for the disclosure of a trade secret that is made (A) in confidence to a federal, state, or local government official, either directly or indirectly, or to an attorney, and solely for the purpose of reporting or investigating a suspected violation of law; or (B) in a complaint or other document filed in a lawsuit or other proceeding, if such filing is made under seal; and (2) if you file a lawsuit for retaliation by an employer for reporting a suspected violation of law may disclose a trade secret to your attorney and use the trade secret information in the court proceeding, if you (A) file any document containing the trade secret under seal; and (B) do not disclose a trade secret, except pursuant to court order.

• 6 -

Dispute Resolution

Except for any claims (i) arising out of, or relating to, your Restrictive Covenant Agreement, and/or any other written and fully executed agreements to which you and the Company or an affiliate thereof are parties that expressly provide for a different dispute resolution mechanism, or (ii) as to which applicable law not preempted by the Federal Arbitration Act prohibits resolution by binding arbitration thereof, any controversy, claim or dispute arising out of or relating to this Term Sheet or your employment with the Company or termination thereof, either during the existence of the employment relationship or afterward, and including, but not limited to, any common law or statutory claims for wrongful discharge, discrimination or unpaid compensation, shall be resolved exclusively by arbitration in King County, Washington, conducted in accordance with the then prevailing commercial arbitration rules of the American Arbitration Association (the “AAA”), with one arbitrator designated in accordance with those rules. The parties agree to abide by all decisions and awards rendered in such proceedings. Such decisions and awards rendered by the arbitrator shall be final and conclusive and may be entered in any court having jurisdiction thereof as a basis of judgment and of the issuance of execution for its collection. All such controversies, claims or disputes shall be settled in this manner in lieu of any action at law or equity; provided, however, that nothing in this paragraph shall be construed as precluding either party from bringing an action for injunctive relief or other equitable relief. In any such dispute, the prevailing party shall be entitled to its or his attorneys’ fees and costs, in addition to any other relief that may be awarded. In accordance with the terms of the Restrictive Covenant Agreement, the exclusive venue for claims arising out of, or related to, the Restrictive Covenant Agreement shall be the state and Federal courts of King County, Washington.

Entire Agreement

This Term Sheet, along with the Restrictive Covenant Agreement, the Plan, the Executive Continuity Plan, and your STI and LTI award agreements, embody the entire agreement and understanding between the parties with respect to the subject matters hereof (including but not limited to your compensation terms) and supersedes all prior oral and written agreements and understandings between the Company and you with respect to the subject matters hereof, and it can only be modified in a fully executed written agreement between you and a duly authorized Company officer. It may be executed by facsimile and in counterparts which, taken together, shall constitute one original. To the extent the provisions of this Term Sheet are inconsistent with the terms of any underlying compensation plan or program, including without limitation any annual performance bonus plan or the Plan, the terms of this Term Sheet shall control. Notwithstanding the foregoing or anything herein to the contrary, to the extent that the Plan or any STI or LTI award agreement provides for more favorable treatment to you of your STI award(s) and/or LTI award(s) than the terms of this Term Sheet, the terms of the Plan or award agreement (as applicable) shall control. For avoidance of doubt, this Term Sheet is not intended to deprive you of any right, entitlement or protection (e.g., indemnification and insurance), in any case, that is not inconsistent with this Term Sheet and that you may have under any other agreement, plan, or policy of the Company applicable to you that may provide more favorable treatment than this Term Sheet, nor is it intended to exclude you from being eligible to receive any employee benefits (provided that such benefits would not result in you receiving a duplication of benefits) that may in the future be broadly provided to similarly-situated employees.

• 7 -

	Similarly, for avoidance of doubt, this Term Sheet is not intended to relieve you of obligations to the Company or requirements of the Company set forth in any other written agreement, plan, or policy of the Company applicable to you (including, without limitation, the Company’s Amended and Restated Executive Incentive Compensation Recoupment Policy as adopted October 2, 2023, as amended from time to time), unless such obligations or requirements are expressly contrary to a commitment in this Term Sheet.
Governing Law	This Term Sheet shall be exclusively governed by and interpreted under the laws of the State of Washington.
Legal Fees	The Company shall promptly reimburse you for your legal fees reasonably incurred in connection with this Term Sheet, not to exceed $50,000, upon reasonable documentation.

Please indicate your acceptance of, and agreement to, the terms and conditions outlined above by signing and dating this Term Sheet below.

[Signature page follows]

• 8 -

Sincerely,
T-MOBILE US, INC.
By:	/s/ Deeanne King
	Deeanne King
	EVP and Chief People Officer

AGREED and ACCEPTED as of the date below:

/s/ Michael J. Katz	3/18/2025
Michael J. Katz	Date

• 9 -

ATTACHMENT A

1.“Cause” shall be defined as any one of the following: (i) your gross neglect or willful material breach of your principal employment responsibilities or duties, (ii) a final judicial adjudication that you are guilty of any felony (other than a law, rule or regulation relating to a traffic violation or other similar offense that has no material, adverse effect on the Company, Deutsche Telekom AG or their respective affiliates), (iii) your breach of the Restrictive Covenant Agreement or any other written non-competition, non-solicitation or confidentiality covenant between you and the Company or any affiliate of the Company (other than a de minimis breach), (iv) fraudulent conduct in the course of your employment with the Company as determined by a court of competent jurisdiction, (v) your unlawful discrimination, harassment, or retaliation, assault or other violent act toward any employee or third party, or other act or omission, in each case that in the reasonable and good faith view of the Board constitutes a material breach of the Company’s written policies or Code of Conduct, or (vi) your material breach of any other obligation to the Company or any of its affiliates which, if reasonably curable, continues uncured for a period of thirty (30) days after notice thereof by the Company or any of its affiliates (and which is demonstrably injurious to the Company or an affiliate thereof). Notwithstanding the foregoing, no cure period shall be required under the foregoing clause (vi) if the breach is a recurrence of conduct that was the subject of a prior notice under such clause (vi) for which a thirty (30)-day cure period was given. For purposes of the foregoing clause (vi), the term “obligation” refers to Company policies and directives and is not intended to refer to performance expectations such as goals set forth in bonus plans or performance evaluations.

2.“Good Reason” shall mean the occurrence of any of the following without your consent, provided that (a) you notify the Company within not more than ninety (90) days after its initial occurrence, (b) the Company does not cure such occurrence within thirty (30) days after receipt of such notice and (c) your employment with the Company terminates within sixty (60) days after the end of the Company’s cure period: (i) a material reduction in your Base Salary, annual Target STI award opportunity or annual Target LTI opportunity, except for across-the-board salary reductions based on the Company’s and subsidiaries’ financial performance similarly affecting all or substantially all management employees of the Company and its affiliates; (ii) the relocation of the office at which you are principally employed to a location more than fifty (50) miles from the location of such office, or you being required to be based anywhere other than such office, except for required travel on business; or (iii) with respect to any calendar year commencing during the Term (commencing with calendar year 2026 and measured as of January 1st of the applicable calendar year), your Base Salary and/or Target LTI opportunity for such calendar year is not equal to (or greater than) the 50th percentile of the then-current base salary and/or target long-term incentive opportunity (as applicable) for the most highly compensated executive officer role (excluding Chief Executive Officers, Chief Financial Officers and, if applicable, Executive Chairs) in the Company’s peer group utilized by the Committee for executive compensation decisions (as determined by the Committee) for such calendar year.

ATTACHMENT B

SEPARATION AGREEMENT1

This Separation Agreement (“Agreement”) is entered into by Michael J. Katz (“Employee”) and T-Mobile US, Inc. (“Employer”).

1.SEPARATION DATE. Employee’s last date of employment with Employer is  [ l ] (the “Separation Date”), after which date Employee will claim no further right to employment.

2.EARNED PAYMENTS AND BENEFITS. Employee acknowledges and agrees he has been provided all compensation and benefits to which Employee is or may be entitled by virtue of Employee’s employment with Employer, except as otherwise provided herein and except to the extent that Employee may still be owed salary earned during the last pay period before the Separation Date and accrued unused paid time off. If Employee is enrolled in Employer’s group medical, dental, or vision plan at the time of separation from employment Employee will remain eligible for such coverage through the end of the month in which Employee remains employed with Employer. Eligibility for Employer provided health or dependent care flexible spending account, life and disability, and all other benefit plans cease on the Separation Date. After the Separation Date, Employee may exercise at Employee’s sole expense whatever rights Employee may have to continuation of medical, dental, or vision benefits under Employer’s group plan under COBRA, and any conversion rights under any life or other applicable insurance program. Any amounts Employee may have as a vested account balance under Employer’s 401(k) plan will be handled in accordance with the terms and conditions of such plan. Except as stated in this Agreement, or as required by law, any rights that Employee may have to payments and benefits by virtue of employment with Employer cease on the Separation Date.

3.ADDITIONAL PAYMENT. In consideration of Employee’s waiver and release and covenants under this Agreement, and provided that the period under Section 10 during which Employee is entitled to revoke the release has expired, Employer will provide Employee with the payments and benefits set forth in the section entitled [“Severance”]/[“Death; Disability”] in Compensation Term Sheet between Employee and Employer, effective as of March 18, 2025 (the “Term Sheet”) from which usual and customary withholdings and deductions other than 401(k) contributions will be subtracted (the aggregate amounts due under such clauses is referred to herein as the “Separation Payments and Benefits”). The Separation Payments and Benefits will be paid at such time(s) as provided in the Term Sheet, provided that Employee has executed and not revoked this Agreement. Employee acknowledges that (a) Employer is not obligated to provide Employee with the Separation Payments and Benefits provided in this Section 3, except under this Agreement, (b) Employer’s obligations set forth in this Agreement provide adequate consideration for Employee’s covenants, waiver, and release in this Agreement, and (c) Employee’s entitlement to earn the Separation Payments and Benefits is conditioned on Employee’s full compliance with this Agreement (including Sections 5, 6, 7, 8, and 14) and any other obligations under other agreements between Employee and the Employer, including without limitation the Restrictive Covenant Agreement (as defined in the Term Sheet) annexed as Attachment E to the Term Sheet. Employee acknowledges and agrees that Employee will be ineligible for rehire at Employer in consideration of receiving payments under this Agreement unless prohibited by law. For purposes of this Agreement, “Affiliate” means any entity currently existing or subsequently organized or formed that directly or indirectly controls, is controlled by, or is under common control with Employer or the entities who

1 Subject to updates in applicable law.

control Employer, whether through the ownership of voting securities, by contract or otherwise, including without limitation Deutsche Telekom AG.

4.WAIVER AND RELEASE. For the purposes of this Agreement, the term “Released Parties” means Employer, its parent(s) (including Deutsche Telekom AG), subsidiaries, and Affiliates, and all of its and their respective companies and its and their present, former, and future successors and assigns, and all of its and their present, former, and future officers, directors, stockholders, employees, agents, trustees, partners, members, and attorneys, in their individual and representative capacities. On behalf of Employee and Employee’s marital community, heirs, executors, administrators, and assigns, Employee expressly waives, releases, and discharges any and all claims, whether known or unknown, against any or all of the Released Parties, to the extent that any acts or omissions related to or connected with such claims occurred or could be alleged to have occurred before the execution of this Agreement (“Released Claims”). Released Claims include claims (including claims to attorneys’ fees), damages, losses, causes of action, and disputes of any kind whatsoever, including without limitation all claims for wages, compensation, employee benefits, and damages arising out of any: contracts, express or implied, including without limitation the Term Sheet; any incentive compensation, bonus, or retention or equity plans; tort; discrimination; wrongful termination; any federal, state, local, or other governmental statute or ordinance, including without limitation Title VII of the Civil Rights Act of 1964, as amended; the Age Discrimination in Employment Act, as amended (“ADEA”); the Employee Retirement Income Security Act of 1974, as amended (“ERISA”); the Family and Medical Leave Act (“FMLA”); the Americans with Disabilities Act; the Washington Paid Sick Leave Act; RCW 49.46.005 to RCW 49.46.920 and Wash. Admin. Code 296-128-600to 296-128-760; the Washington Family Care Act, RCW 49.12.265 and Wash. Admin. Code 296-130-010 to 296-130-100; the Washington Domestic Violence Leave Act, RCW 49.76.010 to RCW 49.76.900; the Washington Military Family Leave Act; RCW 49.77.010 to RCW 49.77.900; the Washington law concerning leave for certain emergency services personnel, RCW 49.12.460; the Washington Minimum Wage Act, RCW 49.46.005 to 49.46.920; the Washington Industrial Welfare Act, RCW 49.12.005 to 49.12.903; the Washington Law Against Discrimination, RCW 49.60.010 to 49.60.510; the Washington Wage Payment Act and the Wage Rebate Act, RCW 49.48.010 to 49.48.900 and 49.52.010 to 49.52.090; and any other employment and wage and hour laws of the state of Washington and any other applicable state; and any other legal limitation on the employment relationship. Notwithstanding the foregoing, “Released Claims” do not include claims for breach or enforcement of this Agreement, claims that arise after the execution of this Agreement, claims to vested benefits under ERISA, unemployment compensation claims, claims for indemnification and rights to coverage under Employer’s director and officer policies to the extent provided to you as of the Separation Date, claims to the Separation Payments and Benefits, or any other claims that may not be released under this Agreement in accordance with applicable law. Employee agrees to cooperate fully with Employer and its agents in seeking any governmental or judicial approval of the terms of this Agreement in order to ensure that it is fully enforceable as written, to the extent such approval becomes necessary. Employee further represents and warrants that Employee has no present or past claim against Employer alleging any violation of the FMLA and/or the FLSA.

Employee expressly understands and acknowledges that it is possible that unknown claims (including claims for attorneys’ fees), damages, losses, causes of action, or disputes exist or may have been underestimated in amount or severity. Employee expressly accepts and assumes the risk of such unknown or underestimated claims, damages, losses, causes of action, and disputes and acknowledges and agrees that the benefits to be provided to Employee pursuant to this Agreement fully compensate Employee for such risks.

5.COVENANT NOT TO SUE. Employee represents and warrants that Employee has not filed any litigation based on any Released Claims. Employee covenants and promises never to file, press, or join in any lawsuit based on any Released Claim and agrees that any such claim, if filed by Employee, will be dismissed, except that this covenant and promise does not apply to any claim of Employee challenging the validity of this Agreement in connection with claims arising under the ADEA and/or the Older Workers’ Benefit Protection Act of 1990 (“OWBPA”). Employee represents and warrants: (a) at the time of execution of this Agreement, Employee has no knowledge of any Released Claims that Employee may have had to assert against Employer except for those that Employee reported in writing to Employers Chief People Officer before Employee’s execution of this Agreement; (b) Employee is the sole owner of any and all Released Claims that Employee may have; and (c) Employee has not assigned or otherwise transferred Employee’s right or interest in any Released Claim.

6.EMPLOYER PROPERTY. Employee represents and warrants that Employee has turned over to Employer all property of Employer and Deutsche Telekom AG, including without limitation all files, memoranda, keys, manuals, notebooks, hard drives, USB drives, CDs, DVDs, equipment, data, records, and other documents, including electronically recorded documents and data that Employee received from Employer or Deutsche Telekom AG or their employees or that Employee generated in the course of employment with Employer or Deutsche Telekom AG. Employee further represents and warrants that Employee has disclosed to Employer all passwords, codes, or any other mechanism by which Employee has or had access to Employers computer systems or facilities. Employee promises not to access or attempt to access Employers or its Affiliates’ computer systems or software or facilities as of the Separation Date or thereafter, nor will Employee provide information to any other person or entity that will allow that party unauthorized access to Employers or its Affiliates’ computer systems or software or facilities.

7.CONFIDENTIALITY. Employee acknowledges and agrees that Employee has had obligations to protect, keep confidential, and not use other than for the best interests of Employer the confidential or proprietary information or intellectual property of Employer or its Affiliates or to transfer to Employer or its Affiliates any interest in intellectual property to Employer, whether contractual or otherwise, including under any restrictive covenants to which Employee has agreed, under common law and statutes, and otherwise (collectively, “IP Obligations”). Employee acknowledges and agrees that the IP Obligations will remain in full force and effect and that Employee will comply fully with such obligations. Employee represents and warrants that Employee has been in full compliance with the IP Obligations at all times before entry into this Agreement. In addition to and not in place of any IP Obligations Employee may have, Employee agrees not to use or disclose any confidential or proprietary information or trade secrets of Employer or any of its Affiliates. For the purposes of this Agreement, “confidential or proprietary information or trade secrets” means all data and information in whatever form, tangible or intangible, that is not generally known to the public and that relates to the business, technology, strategies, practices, products, marketing, sales, services, finances, or legal affairs of Employer or its Affiliates or any third party doing business with or providing information to Employer or its Affiliates. Employee agrees and acknowledges that the terms and conditions of this Agreement are confidential and will not be disclosed to any third party, except for Employee’s spouse, attorney, or financial advisor, who Employee covenants will comply with this provision. Employee will refrain from making disparaging statements about Employer or its Affiliates, or any of their personnel, products, or services. Nothing in this Section 7 is intended to restrict Employee’s compliance with law or the legal process. Further, notwithstanding the foregoing or anything herein to the contrary, Employee understands that (a) nothing contained herein will prohibit Employee from filing a charge with, reporting possible violations of federal law or regulation to, participating in any investigation by, or cooperating with any governmental agency or entity or making

other disclosures that are protected under the whistleblower provisions of applicable law or regulation; (b) nothing herein is intended to or will prevent Employee from communicating directly with, cooperating with, or providing information (including trade secrets) in confidence to, any federal, state or local government regulator (including, but not limited to, the U.S. Securities and Exchange Commission, the U.S. Commodity Futures Trading Commission, the U.S. Department of Justice or the U.S. National Labor Relations Board or any similar agency) for the purpose of reporting or investigating a suspected violation of law, or from providing such information to Employee’s attorney or in a sealed complaint or other document filed in a lawsuit or other governmental proceeding, or from exercising any rights the Employee may have, if any, under Section 7 of the U.S. National Labor Relations Act; and (c) pursuant to 18 USC Section 1833(b), (x) Employee will not be held criminally or civilly liable under any federal or state trade secret law for the disclosure of a trade secret that is made: (i) in confidence to a federal, state, or local government official, either directly or indirectly, or to an attorney, and solely for the purpose of reporting or investigating a suspected violation of law; or (ii) in a complaint or other document filed in a lawsuit or other proceeding, if such filing is made under seal, and (y) if the Employee files a lawsuit for retaliation by an employer for reporting a suspected violation of law, the Employee may disclose a trade secret to his attorney and use the trade secret information in the court proceeding, if the Employee (A) files any document containing the trade secret under seal, and (B) does not disclose the trade secret, except pursuant to court order.

8.INTELLECTUAL PROPERTY.

(a)In addition to Employee’s obligation under the IP Obligations, and subject to Sections 8(b) and 8(c) below, Employee hereby assigns all right, title, and interest in and to all Inventions to Employer, its successors, and assigns. “Inventions” means any and all inventions, software, discoveries, developments, concepts, ideas, know-how, trade secrets, prototypes, designs, methods, processes, and techniques, and improvements to any of the foregoing, which Employee conceived, authored, or otherwise generated and/or reduced to practice (alone or jointly with any of Employer’s employees or agents) in the course of Employee’s employment with Employer.

(b)NOTICE: The obligation to assign inventions under Section 8(a) will not apply to any inventions for which no equipment, supplies, facilities, or trade secret information of Employer were used and that were developed entirely on Employee’s own time, unless (i) the invention relates (A) directly to the business of Employer, or (B) to Employer’s actual or demonstrably anticipated research or development, or (ii) the invention results from any work performed by Employee for Employer.

(c)To the extent that Employee used or incorporated (or permitted others to use or incorporate) any of Employee’s proprietary know-how that was in existence before Employee’s employment with Employer (“Existing Employee Know-How”) in any services, technology, or products prepared or produced in connection with employment with Employer, Employee hereby grants to Employer a non-exclusive, irrevocable, perpetual, royalty-free, fully paid up, worldwide right and license under such Existing Employee Know-How (including any patent or other intellectual property rights therein) to further develop, make, use, sell, and import any and all services, technology, or products, and to sublicense any or all of the foregoing rights (including the right to grant further sublicenses), for so long as such Existing Employee Know-How is in existence and is licensable by Employee.

(d)To the extent any materials Employee created within the scope of employment may be considered “works made for hire” under United States copyright laws, they are hereby agreed to be works made for hire. To the extent any such works do not qualify as a “work made for hire” under applicable law, and to the extent they include material subject to copyright, mask work, trademark, trade secret, or

any other proprietary rights protection, and to the extent they are not Existing Employee Know How, Employee hereby irrevocably and exclusively assigns and agrees to assign to Employer, its successors, and assigns, all right, title, and interest in and to all such materials. To the extent any of Employee’s rights in the same, including any moral rights, are not subject to assignment hereunder, Employee hereby irrevocably and unconditionally waives all enforcement of such rights.

(e)Employee agrees to execute and deliver such instruments and take such other actions as may be required to carry out the assignments contemplated by this Section 8. If Employee fails to execute such instruments by reason of Employee’s mental or physical disability or any other reason, Employee hereby irrevocably appoints Employer and its officers and agents as Employee’s agent and attorney-in-fact to execute such instruments on Employee’s behalf.

9.REMEDIES. Employee acknowledges and agrees that breach of any of the covenants contained in Sections 5, 6, 7, 8, and 14 of this Agreement constitutes a material breach of this Agreement that may cause Employer or its Affiliates irreparable harm and will entitle the Employer and its Affiliates to all remedies provided by law, including injunctive relief.

10.CONSIDERATION AND REVOCATION PERIOD. Following delivery of this Agreement, Employee has 21 days to review and consider this Agreement, after which time the offer of this Agreement will expire and may no longer be accepted (provided that if the 21-day consideration period expires before the Separation Date, Employee cannot sign the Agreement until the Separation Date and it will not expire before the Separation Date). Employee may accept this Agreement before the expiration of the 21-day consideration period and if Employee does so, by Employee’s signature, Employee expressly acknowledges that Employee has knowingly and voluntarily chosen to sign this Agreement before the expiration of the 21-day consideration period. Employee has a period of seven calendar days after delivering the executed Agreement to Employer to revoke acceptance of the Agreement. To revoke, Employee must deliver a notice revoking Employee’s acceptance of this Agreement to the attention of the Vice President of Legal Affairs, T-Mobile US, Inc., 12920 SE 38th Street, Bellevue, WA 98006. This Agreement shall become effective on the eighth day after delivery of this executed Agreement by Employee to Employer, provided that Employee has not revoked acceptance or rescinded the Agreement.

11.ENTIRE AGREEMENT/AMENDMENT/SEVERABILITY. This Agreement constitutes the entire understanding between Employer and Employee as it relates to the subject matter of this Agreement and supersedes all other representations, statements, and understandings or agreements pertaining to such subject matter, except that this Agreement does not supersede any of Employee’s existing obligations (a) to Employer (including the IP Obligations or any Employee obligation to arbitrate disputes) or (b) under other agreements between Employee and Employer (including any and all restrictive covenants to which Employee may have agreed), all of which remain in full force and effect. The provisions of this Agreement are severable, and if any provision of it is found to be unlawful or unenforceable, it will be deemed narrowed to the extent required to make it lawful and enforceable. If such modification is not possible, such provision will be severed from the Agreement and the remaining provisions will remain fully valid and enforceable to the maximum extent consistent with applicable law, provided, however, that Section 4 may not be severed from the Agreement. Nothing in this Agreement reflects any admission of liability by Employer or Employee.

12.KNOWING AND VOLUNTARY AGREEMENT. Employee hereby warrants and represents that: (a) Employee has carefully read this Agreement and finds that it is written in a manner that Employee understands; (b) Employee knows the contents of this Agreement; (c) Employee is and has been advised to consult and has either discussed the Agreement and its effects

with Employee’s personal attorney or has knowingly and voluntarily waived the right to do so; (d) Employee understands that Employee is giving up all claims, damages, and disputes that have arisen before the date of this Agreement, except as provided herein; (e) Employee has had at least twenty-one (21) days to review and analyze this entire Agreement and has been given seven (7) days to revoke or rescind this Agreement; (f) Employee did not rely upon any representation or statement concerning the subject matter of this Agreement, except as expressly stated in the Agreement; (g) Employee understands the Agreement’s final and binding effect; and (h) Employee has signed the Agreement as Employee’s free and voluntary act.

13.VENUE/CHOICE OF LAW. The exclusive venue of any litigation arising from this Agreement will be King County, Washington, except that the parties may seek injunctive relief in any court with jurisdiction. This Agreement will be governed by and interpreted under the laws of the state of Washington, excluding its choice of law rules.

14.COOPERATION. In return for the amounts paid hereunder, Employee agrees to cooperate in defense of Employer and its Affiliates in any legal action or claim in which Employee is named as a witness. Cooperation will include, upon request by Employer, preparing for, participating in and testifying at depositions, trials, mediations, arbitrations, or other hearings; providing information in written format such as declaration or affidavit; and providing general assistance to Employer, its Affiliates, and their attorneys.

EMPLOYEE	T-Mobile US, Inc.
___________________________	By: _______________________________
Michael J. Katz	Name: _____________________________
	Title: ______________________________
___________________________
(Date)	Date: ______________________________
(Employee Address)
___________________________	T-Mobile
___________________________	12920 SE 38th Street
___________________________	Bellevue, WA 98006

ATTACHMENT C

It is intended that the payments and benefits under this Term Sheet comply with the provisions of Section 409A and the Treasury regulations relating thereto, or satisfy the requirements for an exemption from Section 409A, in each case to the extent applicable to this Agreement and, accordingly, to the maximum extent permitted, this Term Sheet shall be interpreted and be administered in a manner to be in compliance therewith. Notwithstanding anything contained herein to the contrary, to the extent required in order to avoid accelerated taxation and/or tax penalties under Section 409A, you shall not be considered to have terminated employment with the Company for purposes of this Term Sheet, and no payment otherwise due upon a termination of employment shall be due to you under this Term Sheet, until you would be considered to have incurred a “separation from service” from the Company within the meaning of Section 409A (a “Separation from Service”). Any payments described in this Term Sheet that qualify for the “short-term deferral” exception from Section 409A shall not be treated as deferred compensation as described in Treasury Regulation Section 1.409A-1(b)(4) and will be paid under such exception unless applicable law requires otherwise. For purposes of Section 409A (including, without limitation, for purposes of Treasury Regulation Section 1.409A-2(b)(2)(iii) and the application of the short-term deferral exception), each payment under this Term Sheet will be treated as a separate payment. Notwithstanding anything to the contrary in this Term Sheet (whether under this Term Sheet or otherwise), to the extent delayed commencement of any portion of the payments to be made to you upon your Separation from Service is required to avoid a prohibited payment under Section 409A(a)(2)(B)(i) of the Code, such portion of the payments shall be delayed and paid on the first business day after the earlier of (i) the date that is six (6) months following such Separation from Service or (ii) your death. Notwithstanding anything contained herein to the contrary, to the extent required in order to avoid accelerated taxation and/or tax penalties under Section 409A, amounts reimbursable to you under this Term Sheet shall be paid to you on or before the last day of the year following the year in which the expense was incurred and the amount of expenses eligible for reimbursement (and in-kind benefits provided to you) during any one year may not affect amounts reimbursable or provided in any subsequent year and may not be liquidated or exchanged for any other benefit. Notwithstanding anything in the Term Sheet to the contrary, in the event that the aggregate period during which you are (or your estate is) entitled to consider and/or revoke the Release spans two calendar years, then to the extent required by Section 409A, no payments under the Severance or Death; Disability paragraphs will be made prior to the beginning of the second such calendar year (and any such payments otherwise payable prior thereto (if any) will instead be paid on the first regularly scheduled Company payroll date occurring in the latter such calendar year or, if later, on the first regularly scheduled Company payroll date following the effectiveness of the Release).

ATTACHMENT D

In the event any payment, benefit or distribution of any type to or for the benefit of you, whether paid or payable, provided or to be provided, or distributed or distributable pursuant to the terms of this Term Sheet or otherwise, constitutes a “parachute payment” under Section 280G of the Code, the amount payable to you shall be either (a) paid in full, or (b) paid after reduction by the smallest amount as would result in no portion thereof being subject to the excise tax under Section 4999 of the Code, whichever of the foregoing amounts, taking into account the applicable federal, state and local income taxes and the excise tax under Section 4999 of the Code, results in the receipt by you, on an after-tax basis, of the greater net value, notwithstanding that all or some portion of such payment amount may be taxable under Section 4999 of the Code. Unless the Company and you otherwise agree in writing, all determinations required to be made under this paragraph, including the manner and amount of any reduction in your payments hereunder, and the assumptions to be utilized in arriving at such determinations, shall be made in writing in good faith by the accounting firm serving as the Company’s independent public accounting firm immediately prior to the event giving rise to such payment (the “Accounting Firm”); provided, however, that no such reduction or elimination shall apply to any non-qualified deferred compensation amounts (within the meaning of Section 409A of the Code) to the extent such reduction or elimination would accelerate or defer the timing of such payment in manner that does not comply with Section 409A of the Code. For purposes of making the calculations required by this paragraph, the Accounting Firm may make reasonable assumptions and approximations concerning the application of Sections 280G and 4999 of the Code. The Company and you shall furnish to the Accounting Firm such information and documents as the Accounting Firm may reasonably request to make a determination under this paragraph. The Accounting Firm shall provide its written report to the Committee and you, which shall include information regarding methodology. The Company shall bear all costs the Accounting Firm may reasonably incur in connection with any calculations contemplated by this paragraph. You and the Company shall cooperate in case of a potential Change in Control to consider alternatives to mitigate any Section 280G exposure, although the Company cannot guaranty any such alternatives will be available or approved by the Company and neither you nor the Company shall be obligated to enter into them.

ATTACHMENT E

Restrictive Covenant Agreement

(see attached)

Document

EXHIBIT 10.3

GUARANTEE ASSUMPTION AGREEMENT

GUARANTEE ASSUMPTION AGREEMENT dated as of March 10, 2025, by ADstruc, LLC, a Delaware limited liability company, Blis USA, Inc., a Delaware corporation, Breeze Acquisition Sub LLC, a Delaware limited liability company, Vistar Media Global Partners, LLC, a New York limited liability company, and Vistar Media Inc., a Delaware corporation (collectively, the “Additional Guarantors” and each an “Additional Guarantor”), in favor of Spectrum License Holder LLC (“License Holder I”), Sprint Spectrum License Holder II LLC (“License Holder II”), Sprint Spectrum License Holder III LLC (“License Holder III” and, together with License Holder I and License Holder II, “Lessors” and each, a “Lessor”) under that certain Intra-Company Spectrum Lease Agreement dated October 27, 2016 by and among Lessor, the Guarantors party thereto, Sprint Spectrum Intermediate HoldCo LLC and Sprint Communications, Inc. (as amended from time to time, the “Lease Agreement”).

Pursuant to Section 14 of the Lease Agreement, each Additional Guarantor hereby agrees to become a “Guarantor” for all purposes of the Lease Agreement. Without limiting the foregoing, each Additional Guarantor hereby:

(a) jointly and severally with the other Guarantors, guarantees to Lessors and their respective successors and assigns the prompt payment in full when due of any and all Guaranteed Obligations (as defined in the Lease Agreement) in the same manner and to the same extent as is provided in the Lease Agreement as if such Additional Guarantor were an original party thereto; and

(b) makes the representations and warranties as of the date hereof, and agrees to perform the covenants set forth in, Section 10 of the Lease Agreement with respect to itself and its obligations under this Guarantee Assumption Agreement.

This Guarantee Assumption Agreement shall be governed by, enforced and construed in accordance with, the laws of the State of New York without regard to conflict of laws principles.

[remainder of this page intentionally left blank]

IN WITNESS WHEREOF, the undersigned has caused this Guarantee Assumption Agreement to be duly executed and delivered as of the day and year first above written.

ADSTRUC, LLC

BLIS USA, INC.

VISTAR MEDIA GLOBAL PARTNERS, LLC

VISTAR MEDIA INC.

By:    /s/ Johannes Thorsteinsson                 Name:    Johannes Thorsteinsson Title:    Senior Vice President, Treasury & Treasurer

[Guarantee Assumption Agreement]

BREEZE ACQUISITION SUB LLC

By:    /s/ Johannes Thorsteinsson                 Name:    Johannes Thorsteinsson Title:    Senior Vice President, Treasury & Treasurer

[Guarantee Assumption Agreement]

Accepted and agreed:

SPRINT SPECTRUM LICENSE HOLDER LLC SPRINT SPECTRUM LICENSE HOLDER II LLC SPRINT SPECTRUM LICENSE HOLDER III LLC

By:    /s/ Broady Hodder                     Name:    Broady Hodder Title:    Senior Vice President, Governance, Strategy and Integrity & Secretary

[Guarantee Assumption Agreement]

Document

EXHIBIT 22.1

Subsidiary Guarantors and Issuers of Guaranteed Securities

Guaranteed Securities

The following securities (collectively, the “T-Mobile USA Senior Notes”) issued by T-Mobile USA, Inc., a Delaware corporation and wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), were outstanding as of March 31, 2025, including those that may no longer be subject to reporting as provided by Regulation S-X Rule 13-01:

Description of Notes
3.500% senior notes due 2025
1.500% senior notes due 2026
2.250% senior notes due 2026
2.625% senior notes due 2026
3.750% senior notes due 2027
5.375% senior notes due 2027
4.750% senior notes due 2028
4.750% senior notes due 2028-1 held by affiliate
2.050% senior notes due 2028
4.950% senior notes due 2028
4.800% senior notes due 2028
4.850% senior notes due 2029
2.625% senior notes due 2029
2.400% senior notes due 2029
3.375% senior notes due 2029
3.550% senior notes due 2029
4.200% senior notes due 2029
3.875% senior notes due 2030
2.550% senior notes due 2031
2.875% senior notes due 2031
3.500% senior notes due 2031
2.250% senior notes due 2031
3.150% senior notes due 2032
2.700% senior notes due 2032
3.700% senior notes due 2032
5.125% senior notes due 2032
5.200% senior notes due 2033
5.050% senior notes due 2033
5.750% senior notes due 2034
5.150% senior notes due 2034
4.700% senior notes due 2035
5.300% senior notes due 2035
3.850% senior notes due 2036
3.500% senior notes due 2037
---
4.375% senior notes due 2040
3.000% senior notes due 2041
3.800% senior notes due 2045
4.500% senior notes due 2050
3.300% senior notes due 2051
3.400% senior notes due 2052
5.650% senior notes due 2053
5.750% senior notes due 2054
6.000% senior notes due 2054
5.500% senior notes due 2055
5.250% senior notes due 2055
5.875% senior notes due 2055
3.600% senior notes due 2060
5.800% senior notes due 2062

The following securities (collectively, the “Sprint Senior Notes”) issued by Sprint LLC, a Delaware limited liability company and wholly-owned subsidiary of the Company, were outstanding as of March 31, 2025, including those that may no longer be subject to reporting as provided by Regulation S-X Rule 13-01:

Description of Notes
7.625% senior notes due 2026

The following securities (collectively, the “Sprint Capital Corporation Senior Notes”) issued by Sprint Capital Corporation, a Delaware corporation and wholly-owned subsidiary of the Company, were outstanding as of March 31, 2025, including those that may no longer be subject to reporting as provided by Regulation S-X Rule 13-01:

Description of Notes
6.875% senior notes due 2028
8.750% senior notes due 2032

Obligors

As of March 31, 2025, the obligors under the T-Mobile USA Senior Notes consisted of the Company, as a guarantor, and its subsidiaries listed in the following table.

Name of Subsidiary	Jurisdiction of Organization	Obligor Type
ADstruc, LLC	Delaware	Guarantor
APC Realty and Equipment Company, LLC	Delaware	Guarantor
Assurance Wireless of South Carolina, LLC	Delaware	Guarantor
Assurance Wireless USA, L.P.	Delaware	Guarantor
ATI Sub, LLC	Delaware	Guarantor
Blis USA, Inc.	Delaware	Guarantor
Breeze Acquisition Sub LLC	Delaware	Guarantor
Clearwire Communications LLC	Delaware	Guarantor
Clearwire Legacy LLC	Delaware	Guarantor
Clearwire Spectrum Holdings II LLC	Nevada	Guarantor
Clearwire Spectrum Holdings III LLC	Nevada	Guarantor
Clearwire Spectrum Holdings LLC	Nevada	Guarantor
Fixed Wireless Holdings, LLC	Delaware	Guarantor
IBSV LLC	Delaware	Guarantor
MetroPCS California, LLC	Delaware	Guarantor
MetroPCS Florida, LLC	Delaware	Guarantor
MetroPCS Georgia, LLC	Delaware	Guarantor
MetroPCS Massachusetts, LLC	Delaware	Guarantor
MetroPCS Michigan, LLC	Delaware	Guarantor
MetroPCS Nevada, LLC	Delaware	Guarantor
MetroPCS New York, LLC	Delaware	Guarantor
MetroPCS Pennsylvania, LLC	Delaware	Guarantor
MetroPCS Texas, LLC	Delaware	Guarantor
Mint Mobile, LLC	Delaware	Guarantor
Mint Mobile Incentive Company, LLC	Delaware	Guarantor
Nextel Systems, LLC	Delaware	Guarantor
Nextel West Corp.	Delaware	Guarantor
NSAC, LLC	Delaware	Guarantor
PRWireless PR, LLC	Delaware	Guarantor
PushSpring, LLC	Delaware	Guarantor
Sprint Capital Corporation	Delaware	Guarantor
Sprint Communications LLC	Delaware	Guarantor
Sprint LLC	Delaware	Guarantor
Sprint Solutions LLC	Delaware	Guarantor
Sprint Spectrum LLC	Delaware	Guarantor
Sprint Spectrum Realty Company, LLC	Delaware	Guarantor
SprintCom LLC	Kansas	Guarantor
T-Mobile Central LLC	Delaware	Guarantor
---	---	---
T-Mobile Financial LLC	Delaware	Guarantor
T-Mobile Innovations LLC	Delaware	Guarantor
T-Mobile Leasing LLC	Delaware	Guarantor
T-Mobile License LLC	Delaware	Guarantor
T-Mobile Northeast LLC	Delaware	Guarantor
T-Mobile Puerto Rico Holdings LLC	Delaware	Guarantor
T-Mobile Puerto Rico LLC	Delaware	Guarantor
T-Mobile Resources LLC	Delaware	Guarantor
T-Mobile South LLC	Delaware	Guarantor
T-Mobile USA, Inc.	Delaware	Issuer
T-Mobile West LLC	Delaware	Guarantor
TDI Acquisition Sub, LLC	Delaware	Guarantor
TMUS International LLC	Delaware	Guarantor
TVN Ventures LLC	Delaware	Guarantor
UVNV, LLC	Delaware	Guarantor
Vistar Media Global Partners, LLC	New York	Guarantor
Vistar Media Inc.	Delaware	Guarantor
VMU GP, LLC	Delaware	Guarantor
WBSY Licensing, LLC	Delaware	Guarantor

As of March 31, 2025, the obligors under the Sprint Senior Notes consisted of the Company, as a guarantor; Sprint LLC (a Delaware limited liability company), as issuer and T-Mobile USA, Inc. (a Delaware corporation) and Sprint Communications LLC (a Delaware limited liability company) as guarantors.

As of March 31, 2025, the obligors under the Sprint Capital Corporation Senior Notes consisted of the Company, as a guarantor; Sprint Capital Corporation (a Delaware corporation), as issuer and T-Mobile USA, Inc. (a Delaware corporation), Sprint LLC (a Delaware limited liability company) and Sprint Communications LLC (a Delaware limited liability company) as guarantors.

Document

EXHIBIT 31.1

Certifications of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, G. Michael Sievert, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of T-Mobile US, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

April 24, 2025

/s/ G. Michael Sievert
G. Michael Sievert<br>Chief Executive Officer

Document

EXHIBIT 31.2

Certifications of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Peter Osvaldik, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of T-Mobile US, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

April 24, 2025

/s/ Peter Osvaldik
Peter Osvaldik<br>Executive Vice President and Chief Financial Officer

Document

EXHIBIT 32.1

Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of T-Mobile US, Inc. (the “Company”), on Form 10-Q for the quarter ended March 31, 2025, as filed with the Securities and Exchange Commission (the “Report”), G. Michael Sievert, Chief Executive Officer of the Company, does hereby certify, pursuant to § 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. § 1350), that to his knowledge:

1.The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

April 24, 2025

/s/ G. Michael Sievert
G. Michael Sievert<br>Chief Executive Officer

Document

EXHIBIT 32.2

Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of T-Mobile US, Inc. (the “Company”), on Form 10-Q for the quarter ended March 31, 2025, as filed with the Securities and Exchange Commission (the “Report”), Peter Osvaldik, Executive Vice President and Chief Financial Officer of the Company, does hereby certify, pursuant to § 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. § 1350), that to his knowledge:

1.The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

April 24, 2025

/s/ Peter Osvaldik
Peter Osvaldik<br>Executive Vice President and Chief Financial Officer