X0306 4 2022-06-21 0 0001178697 SONIM TECHNOLOGIES INC SONM 0001438223 TIRVA ROBERT L. C/O SONIM TECHNOLOGIES INC. 6500 RIVER PLACE BLVD, BLDG. 7, S#250 AUSTIN TX 78730 0 1 0 0 President, CFO and COO Common Stock 2022-06-21 4 S 0 10361 0.54 D 324524 D Represents shares sold by the Reporting Person pursuant to a mandatory sale provision of the relevant restricted share unit ("RSU") grant requiring the sale of sufficient shares to cover withholding taxes upon vesting of RSUs. The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $0.54 to $0.5414, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Includes 32,124 RSUs. Each RSU represents the right to receive one share of the Issuer's common stock. /s/ Robert Tirva 2022-06-22