Company: SONM
Filing Date: 2025-11-24
Form Type: PREM14A
Source: 0001493152-25-024848
Chunk: 3

Company: SONIM TECHNOLOGIES INC
Filing Date: 2025-11-24
Form: PREM14A
Chunk 3
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 for the Special Meeting, will be entitled to
vote at the Special Meeting.

The Asset Sale Proposal must be approved by the
holders of a majority of the outstanding shares of common stock entitled to vote thereon at the Special Meeting. Therefore, if you do not vote by proxy or by virtual ballot or, if you hold your shares in“street name,” fail to properly instruct your broker, bank, or other nominee with respect to voting your shares, it will have the same effect as if you voted“AGAINST”
the Asset Sale Proposal.

If you have any questions concerning any of the
proposals, the Asset Purchase Agreement, the Asset Sale, the Special Meeting, or the proxy statement, or would like additional copies
of the proxy statement or need help voting your shares of common stock, please contact Sodali & Co, our proxy solicitor:

<div align='center'>430 Park Avenue, 14th Floor

New York, New York 10022

Stockholders Call Toll-Free in North America:
(800) 662-5200

Outside of North America Call Collect: (203) 658-94000

E-mail:</div>

| On behalf of the Board of Directors,  |             |
| thank you for your continued support, |             |
| Name:                                 | Mike Mulica |
| Title:                                | Chairman    |

San Diego, California

[XX], 2025

Neither the Securities and Exchange Commission nor any state securities regulatory agency has approved or disapproved of the Asset Sale, passed upon the merits or fairness of the Asset Sale, or passed upon the adequacy or accuracy of the information contained in the accompanying proxy statement. Any representation to the contrary is a criminal offence.

| Sonim Technologies, Inc.      
 4445 Eastgate Mall, Suite 200 
 San Diego, CA 92121           |

<div align='center'>NOTICE OF 2025 SPECIAL MEETING OF STOCKHOLDERS</div>

| Date and Time:   | [XX], 2025               
 [XX] a.m., Pacific Time  |
| Virtual Meeting: | Participate online at    
 [www.proxydocs.com/SONM] |
| Record Date:     | Close of business on     
 [XX], 2025               |

NOTICE IS HEREBY GIVENthat a special meeting
(including any postponements or adjournments thereof, the “Special Meeting”) of stockholders of Sonim Technologies, Inc.,
a Delaware corporation (“Sonim,” the “Company