Company: SONM
Filing Date: 2025-07-18
Form Type: DEFA14A
Source: 0001641172-25-020139
Chunk: 0

Company: SONIM TECHNOLOGIES INC
Filing Date: 2025-07-18
Form: DEFA14A
Chunk 0
---
<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934</div>

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

| ☐ | Preliminary                                                       
 Proxy Statement                                                   |
| ☐ | Confidential,                                                     
 for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| ☐ | Definitive                                                        
 Proxy Statement                                                   |
| ☒ | Definitive                                                        
 Additional Materials                                              |
| ☐ | Soliciting                                                        
 Material under §240.14a-12                                        |

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

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

Payment of Filing Fee (Check all boxes that apply):

| ☒ | No           
 fee required |

| ☐ | Fee                                        
 paid previously with preliminary materials |

| ☐ | Fee                                                                                             
 computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

<div align='center'>Sonim Technologies to be acquired by Social Mobile

Transaction Valued at $20 Million

Acquisition enhances Social Mobile’s enterprise solutions while expanding its sellable addressable market, creating valuable new revenue opportunities within carrier channels

Transaction expected to close during Q4 2025, subject to closing conditions</div>

San Diego, CA and Hollywood, FL — July 18, 2025 — Sonim Technologies, Inc. (NASDAQ: SONM) (the “Company”) and Social Mobile today announced that they have entered into a definitive agreement under which Social Mobile will acquire the assets and substantially all current liabilities of Sonim Technologies at $20 million including a $5 million potential earn-out in an all-cash transaction.

This acquisition aligns with Social Mobile’s strategy to expand its footprint in the purpose-built enterprise mobility market. Sonim’s expertise in mission-critical mobile solutions complements Social Mobile’s custom enterprise mobility offerings, creating a powerful synergy to deliver innovative, secure, and scalable solutions for customers worldwide.

The agreement is approved by Sonim’s Board of Directors. The transaction is expected to close in Q4 2025