Company: SONM
Filing Date: 2025-07-07
Form Type: DEFA14A
Source: 0001641172-25-018000
Chunk: 0

Company: SONIM TECHNOLOGIES INC
Filing Date: 2025-07-07
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 |

The following e-mail was distributed to Institutional Shareholder Services (ISS) on July 5, 2025:

Responses below from the Sonim team:

What are the deficiencies in the financing commitment provided by Orbic/Capstone?

Sonim believes the deficiencies of the letter relate to the fact that the letter is, at best, highly conditional as to whether debt financing can actually be arranged, and at worst, is not at all credible. The letter imposes no penalty on the placement agent if it later deems the offering not feasible, nor does the agent act as an underwriter with a binding obligation to purchase securities irrespective of resale prospects. There is no evidence that the referenced placement agent has a history of completing such transactions.

| ● | How                                                                                
 did Sonim identify them as just a “placement agent”?                               |
| ● | Is                                                                                 
 there a risk that the $50 million will not be funded? If so, will Sonim elaborate? |

While Capstone has indicated its commitment to fund the notes, its role is not that of a direct capital provider. Instead, Capstone is identified as the “Lead Arranger,” defined as