Company: SONM
Filing Date: 2025-06-18
Form Type: DEFC14A
Source: 0001641172-25-015578
Chunk: 116

Company: SONIM TECHNOLOGIES INC
Filing Date: 2025-06-18
Form: DEFC14A
Chunk 116
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 the reverse of this proxy card, all of the shares of common stock of Sonim Technologies, Inc. that the undersigned stockholder(s) is/are entitled to vote at the Annual Meeting of Stockholders to be held at 9:00 am ET on July 18, 2025 via a live webcast at www.cesonlineservices.com/sonm25_vm, and any continuation, postponement, or adjournment thereof.

The Named Proxies are authorized to vote in their discretion (i) for the election of any person to the Board of Directors if any nominee named herein becomes unable to serve or for good cause will not serve, (ii) on any matter that the Board of Directors did not know would be presented at the Annual Meeting of Stockholders by a reasonable time before the proxy solicitation was made, and (iii) on such other business as may properly be brought before the Annual Meeting of Stockholders or any continuation, postponement, or adjournment thereof. This proxy, when properly executed, will be voted in the manner directed herein. If no such direction is made, this proxy will be voted in accordance with the Board of Directors’ recommendations. Proxies cannot be voted “FOR” more than five (5) nominees.

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice and Proxy Statement and Annual Report are available at https://ir.sonimtech.com/.

PLEASE MARK, SIGN, DATE AND RETURN THIS WHITEPROXY CARD PROMPTLY USING ENCLOSED REPLY ENVELOPE.

<div align='center'>(continued and to be signed on the reverse side)</div>

<div align='center'>Sonim Technologies, Inc.

YOUR VOTE IS IMPORTANT

Please take a moment now to vote your shares of Sonim Technologies, Inc.

for the upcoming Annual Meeting of Stockholders

YOU CAN VOTE TODAY USING ANY OF THE FOLLOWING METHODS:</div>

|    |     | Submit your proxy by Internet:                                                                                        |
|    |     | Please access www.fcrvote.com/sonm then, simply follow the easy instructions on the voting                            
 site. You will be required to provide the unique Control Number printed below.                                        |
| OR |     |                                                                                                                       |
|    |     | Submit                                                                                                                
 your proxy by Telephone:                                                                                              |
|    |     | Please call toll-free in the U.S. or Canada at 1-866-402-3905 on a touch-tone telephone. Then, simply follow the easy 
 voice prompts. You