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

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

Sonim Technologies, Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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

The following e-mails were distributed to certain employees of the registrant on July 8, 2025:

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Dear Team,

Just a friendly reminder: if you or any of your friends or family have Sonim shares bought independently through an external agency, you can get assistance with voting those shares from the Sodali team. Feel free to reach out to them at SONM@investor.sodali.com, and they’ll be more than happy to help you with the voting process.

温馨提醒：如果您或您的朋友或家人通过外部机构独立购买了Sonim股票，Sodali团队可以协助您进行投票。请通过SONM@investor.sodali.com与他们联系，他们会非常乐意为您提供帮助。

***

Team,

Reminder that any questions or assistance specific to the WHITE card for proxy voting, are to be directed to your broker directly or the Company’s proxy solicitor, Sodali. This applies to all employees and also friends and family that own shares in Sonim.

430 Park Avenue, 14th Floor,

New York, NY 10022

Banks and Brokers Call: (203) 658-9400

Stockholders Call Toll Free: (800) 662-5200

E-mail: SONM@investor.sodali.com

Voting closes July 17, 2025 at 11:59PM Eastern Time.

Important Information and Where to Find It

This press release may be considered to be a soliciting material in connection with the 2025 Annual Meeting of Stockholders. Sonim has filed with the SEC a definitive proxy statement on Schedule 14A, containing a form of WHITE proxy card, with respect to its solicitation of proxies for the 2025 Annual Meeting of Stockholders.

Sonim’s stockholders are strongly encouraged to read Sonim’s definitive proxy statement (including any amendments or supplements thereto) and any other documents to be filed with the SEC carefully and in their entirety when they become available because they will contain important information.

Stockholders may obtain a free copy of the definitive proxy statement, any amendments or supplements to the proxy statement, and other documents that Sonim files with the SEC at no charge from the SEC’s website at www.sec.gov. Copies will also be available at no charge on Sonim’s website at https://ir.sonimtech.com/sec-filings/all-sec-filings.

Additional Information and Where to Find It

This communication relates to the proposed transaction involving Sonim. This communication does not constitute a solicitation of any vote or approval. In connection with the proposed transaction, Sonim plans to file with the SEC a proxy statement (the “Proxy Statement”) relating to a special meeting of its stockholders and may file other documents with the SEC relating to the proposed transaction, including a prospectus. This communication is not a substitute for the Proxy Statement or any other document that Sonim may file with the SEC or send to its stockholders in connection with the proposed transaction. Before making any voting decision, stockholders of Sonim are urged to read the Proxy Statement in its entirety when it becomes available and any other relevant documents filed or to be filed with the SEC and any amendments or supplements thereto and any documents incorporated by reference therein, because they will contain important information about the proposed transaction and the parties to the proposed Transaction. Any vote in respect of resolutions to be proposed at a stockholder meeting of Sonim to approve the proposed transaction or related matters, or other responses in relation to the proposed transaction, should be made only on the basis of the information contained in the Proxy Statement. Investors and security holders will be able to obtain the Proxy Statement and other documents Sonim files with the SEC (when available) free of charge at the SEC’s website (http://www.sec.gov) or at Sonim’s investor relations website (https:// https://ir.sonimtech.com/) or by e-mailing Sonim to ir@sonimtech.com.

Participants in the Solicitation

Sonim and its respective directors, executive officers, and other members of their management and employees, including Peter Liu (Chief Executive Officer and a director), Clay Crolius (Chief Financial Officer), and Sonim’s directors-James Cassano, Mike Mulica, Jack Steenstra, and Jeffrey Wang-under SEC rules, may be deemed to be participants in the solicitation of proxies of Sonim’s stockholders in connection with the proposed Transaction.

Stockholders may obtain more detailed information regarding Sonim’s directors and executive officers, including a description of their direct or indirect interests, by security holdings or otherwise, under the captions “Directors, Executive Officers, and Corporate Governance,” “Security Ownership of Certain Beneficial Owners and Management,” and “Certain Relationships and Related Party Transactions”  of Sonim’s definitive proxy statement for the 2025 Annual Meeting filed with the SEC on June 18, 2025.

Any subsequent updates following the date hereof to the information regarding the identity of potential participants, and their direct or indirect interests, by security holdings or otherwise, will be set forth in the Proxy Statement and other materials to be filed with the SEC in connection with the proposed Transaction, if and when they become available. These documents will be available free of charge as described above.

Forward-Looking statements

This communication contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. These statements relate to, among other things, the anticipated effects of the proposed transaction and the strategy of Sonim in connection with strategic alternatives, the anticipated terms of the proposed transaction, potential benefits of the proposed transaction to Sonim’s stockholders, and anticipated difficulties in connection with certain aspects of Orbic’s offer. These forward-looking statements are based on Sonim’s current expectations, estimates and projections, and certain assumptions made by Sonim, all of which are subject to change. Forward-looking statements generally can be identified by the use of forward-looking terminology such as “achieve,” “aim,” “ambitions,” “anticipate,” “believe,” “committed,” “continue,” “could,” “designed,” “estimate,” “expect,” “forecast,” “future,” “goals,” “grow,” “guidance,” “intend,” “likely,” “may,” “milestone,” “objective,” “on track,” “opportunity,” “outlook,” “pending,” “plan,” “poised,” “position,” “possible,” “potential,” “predict,” “progress,” “promises,” “roadmap,” “seek,” “should,” “strive,” “targets,” “to be,” “upcoming,” “will,” “would,” and variations of such words and similar expressions or the negative of those terms or expressions. Such statements involve risks and uncertainties, which could cause actual results to vary materially from those expressed in or indicated by the forward-looking statements. Factors that may cause actual results to differ materially include, but are not limited to, the following: the ability of Sonim to meet expectations regarding the timing and completion of the proposed transaction; the possibility that the LOI will not result in the definitive agreement; the possibility that the conditions to the closing of the proposed transaction are not satisfied, including the risk that the required approvals are not obtained, the Sonim Legacy Business Sale does not close, and that Sonim’s stockholders do not approve the proposed transaction; the challenges of maintaining Nasdaq listing and the potential necessity to implement a reverse stock-split in order to remain listed on Nasdaq; the occurrence of any event, change or other circumstances that could result in the definitive agreement (if ever executed) being terminated or the proposed transaction not being completed on the terms reflected in the definitive agreement, or at all; potential litigation relating to the proposed transaction; the risk that the proposed transaction and its announcement could have adverse effects on the market price of Sonim’s common stock; the risk that the current board of directors of Sonim loses the proxy contest and the new directors’ slate determines to terminate the proposed transaction (whether at the state of LOI or definitive agreement); the effect of the announcement of the proposed transaction on the ability of Sonim to retain key personnel and maintain relationships with customers and business partners; the risk of unexpected costs or expenses resulting from the proposed transaction and the LOI; and other risks and uncertainties, including those described under “Risk Factors” included in Sonim’s most recent Annual Report on Form 10-K and any subsequent quarterly filings on Form 10-Q filed with the Securities and Exchange Commission (available at www.sec.gov). Sonim cautions you not to place undue reliance on forward-looking statements, which speak only as of the date hereof. Sonim assumes no obligation to update any forward-looking statements in order to reflect events or circumstances that may arise after the date of this release, except as required by law.