SONM · Sonim Technologies, Inc.

On April 27, 2026, the Audit Committee of Sonim Technologies, Inc. dismissed Baker Tilly US, LLP as its independent registered public accounting firm and engaged TAAD LLP for the fiscal year ending December 31, 2026. Baker Tilly's audit reports for fiscal years 2024 and 2025 were unqualified except that the 2025 report included a going concern qualification. During the relevant periods, there were no disagreements with Baker Tilly, but a material weakness in internal control over financial reporting was identified and not yet remediated. The company provided Baker Tilly with a copy of the Form 8-K, and Baker Tilly furnished a letter agreeing with the statements, filed as Exhibit 16.1. The change in auditor signals heightened scrutiny of financial reporting and internal controls, which may impact investor confidence and require monitoring of remediation efforts.