Company: SONM
Filing Date: 2025-07-08
Form Type: DFAN14A
Source: 0001213900-25-062105
Chunk: 0

Company: SONIM TECHNOLOGIES INC
Filing Date: 2025-07-08
Form: DFAN14A
Chunk 0
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<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)

AJP HOLDING COMPANY, LLC

ORBIC NORTH AMERICA, LLC

JEFFREY WANG

PARVEEN NARULA

ASHIMA NARULA

DOUGLAS B. BENEDICT

JOSEPH M. GLYNN

GREGORY MARK JOHNSON

SUREN SINGH

MICHAEL WALLACE

(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 Service (“ISS”) on July 8, 2025:

Orbic asked me to make the following points to you in response to Sonim’s
press release on July 2.

Firstly, we’d like to make it clear that Sonim’s Special Committee
has failed to engage with Orbic on its revised offer.

Orbic believes that Sonim’s current board of directors, and the Special
Committee has failed to act in shareholders’ best interests. Despite presenting a credible, fully committed financed offer to acquire
substantially all of the assets of Sonim at a significant premium, the Special Committee has chosen to mischaracterize the validity of
the offer without having