SONM · DNA X, Inc.

Represents the grant of restricted stock units that vest in equal monthly installments over a one-year period following the date of the grant, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 4,071 shares of common stock and (ii) 50,000 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-18 reverse stock split effected by the Issuer on October 27, 2025, which was exempt from reporting pursuant to Rule 16a-9.

Represents the grant of restricted stock units that vest in equal monthly installments over a one-year period following the date of the grant, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 1,719 shares of common stock and (ii) 35,000 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-18 reverse stock split effected by the Issuer on October 27, 2025, which was exempt from reporting pursuant to Rule 16a-9.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.30 to $1.47, inclusive.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.28 to $1.75, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote and footnote 2.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.43 to $1.45, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.42 to $1.45, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.42 to $1.45, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.42 to $1.45, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.42 to $1.45, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.42 to $1.45, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Represents the grant of restricted stock units that vest in one installment on the 45th day following the date of the grant, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 14,757 shares of common stock and (ii) 57,750 unvested restricted stock units.

Represents the grant of restricted stock units that vest in one installment on the 45th day following the date of the grant, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 14,770 shares of common stock and (ii) 57,750 unvested restricted stock units.

Represents the grant of restricted stock units that vest in one installment on the 45th day following the date of the grant, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 32,363 shares of common stock and (ii) 68,747 unvested restricted stock units.

Represents the grant of restricted stock units that vest in two equal installments on the 90th and 180th day following the date of the grant, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 8,670 shares of common stock and (ii) 33,922 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-10 reverse stock split effected by the Issuer on July 17, 2024, which was exempt from reporting pursuant to Rule 16a-9.

Represents the grant of restricted stock units that vest in two equal installments on the 90th and 180th day following the date of the grant, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 205,784 shares of common stock and (ii) 63,604 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-10 reverse stock split effected by the Issuer on July 17, 2024, which was exempt from reporting pursuant to Rule 16a-9.

Represents the grant of restricted stock units that vest in two equal installments on the 90th and 180th day following the date of the grant, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 23,323 shares of common stock and (ii) 70,671 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-10 reverse stock split effected by the Issuer on July 17, 2024, which was exempt from reporting pursuant to Rule 16a-9.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.27 to $3.36, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Consists of (i) 32,363 shares of common stock and (ii) 22,019 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-10 reverse stock split effected by the Issuer on July 17, 2024, which was exempt from reporting pursuant to Rule 16a-9.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, a change in control of the Issuer, or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 34,922 shares of common stock and (ii) 22,019 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-10 reverse stock split effected by the Issuer on July 17, 2024, which was exempt from reporting pursuant to Rule 16a-9.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.67 to $3.76, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Consists of (i) 14,757 shares of common stock and (ii) 11,022 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-10 reverse stock split effected by the Issuer on July 17, 2024, which was exempt from reporting pursuant to Rule 16a-9.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.65 to $3.67, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Consists of (i) 14,757 shares of common stock and (ii) 11,022 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-10 reverse stock split effected by the Issuer on July 17, 2024, which was exempt from reporting pursuant to Rule 16a-9.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.67 to $3.72, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Consists of (i) 14,770 shares of common stock and (ii) 11,022 unvested restricted stock units.

The number of securities reported herein reflects the effects of a 1-for-10 reverse stock split effected by the Issuer on July 17, 2024, which was exempt from reporting pursuant to Rule 16a-9.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.69 to $0.73, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Consists of (i) 132,515 shares of common stock and (ii) 141,496 unvested restricted stock units.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.69 to $0.71, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Consists of (i) 282,534 shares of common stock and (ii) 145,622 unvested restricted stock units.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.69 to $0.74, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Consists of (i) 132,649 shares of common stock and (ii) 141,496 unvested restricted stock units.

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. These sales are mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.69 to $0.71, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Consists of (i) 132,516 shares of common stock and (ii) 141,496 unvested restricted stock units.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of the Issuer, or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 318,550 shares of common stock and (ii) 145,622 unvested restricted stock units.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of the Issuer, or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 168,531 shares of common stock and (ii) 141,496 unvested restricted stock units.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of the Issuer, or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 168,531 shares of common stock and (ii) 141,496 unvested restricted stock units.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of the Issuer, or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 168,531 shares of common stock and (ii) 141,496 unvested restricted stock units.

The options will vest over the next three (3) years in equal yearly installments on each anniversary of the grant date.

Represents the grant of restricted stock units that vest in one installment on the earlier of November 12, 2024, a change in control of the Issuer, or the Reporting Person's death or disability. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 229,025 shares of common stock and (ii) 156,200 unvested restricted stock units.

The options will vest in eleven (11) equal quarterly installments from February 29, 2024 to August 29, 2026. The options become exercisable upon vesting.

The options vest in their entirety on the first anniversary of the grant date.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of the Issuer, or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 79,006 shares of common stock and (ii) 152,074 unvested restricted stock units.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of the Issuer, or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 79,006 shares of common stock and (ii) 152,074 unvested restricted stock units.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of the Issuer, or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 229,025 shares of common stock and (ii) 89,525 unvested restricted stock units.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of the Issuer, or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Consists of (i) 79,006 shares of common stock and (ii) 152,074 unvested restricted stock units.

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $0.635 to $0.71, inclusive. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a securityholder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

Consists of (i) 254,505 vested stock options and (ii) 2,759,914 stock options that will vest in eleven equal quarterly installments from October 14, 2023 to April 14, 2026. The options become exercisable upon vesting.

The options vest in their entirety on the first anniversary of the grant date.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of Sonim Technologies, Inc. (the "Issuer") or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

The options vest over a four-year period, with one quarter (1/4) of the options vesting on April 14, 2023 (the one-year anniversary of the date of the Reporting Person's appointment as CEO of Sonim Technologies, Inc.), and all remaining options vesting in equal quarterly installments in the amount of one-twelfth (1/12) of the remaining options amount thereafter.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of Sonim Technologies, Inc. (the "Issuer") or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of Sonim Technologies, Inc. (the "Issuer") or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.

Represents the grant of restricted stock units that vest in one installment on the earlier of the first anniversary of the grant date, immediately prior to the next annual meeting of stockholders, a change in control of Sonim Technologies, Inc. (the "Issuer") or the Reporting Person's death or disability, subject to the Reporting Person's continued service to the Issuer. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock.