Power of Attorney for George Thangadurai

The filing is a Power of Attorney document executed by George Thangadurai, a director of Sonim Technologies Inc. The document appoints Hao (Peter) Liu and Clayton Crolius as attorneys-in-fact, granting them the authority to act on Thangadurai's behalf in matters related to SEC filings. This includes preparing, executing, and submitting Forms 3, 4, 5, Schedules 13D and 13G, and Forms 144, as well as obtaining transaction information from third parties. The Power of Attorney remains in effect until Thangadurai is no longer required to file these forms or until it is revoked in writing. The document was executed on September 9, 2025.