Company: SONM
Filing Date: 2025-07-11
Form Type: DFAN14A
Source: 0001213900-25-063201
Chunk: 0

Company: SONIM TECHNOLOGIES INC
Filing Date: 2025-07-11
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 Stockholders by Broadridge Financial Solutions Inc. on July 11, 2025:

<div align='center'>Be the vote that counts.

SONIM TECHNOLOGIES, INC.

2025 Contested Solicitation

Vote by July 17, 2025

This solicitation is CONTESTED.

1</div>

This request for Voting Instruction is being solicited by THE AJP/ORBIC PARTIESand NOTby the Board of Directors and represents the agenda on the BLUE CARD.

Important Information

Account Number:3456789012345678901

Control Number:0123456789012345

View documents:

Proxy Materials|

| © 2025 Broadridge Financial Solutions Inc.