 AUSTIN, Texas, March 10, 2021 PRNewswire -- Sonim Technologies, Inc. Nasdaq: SONM, a leading U.S. provider of ultra-rugged mobility solutions designed specifically for task workers physically engaged in their work environments, reported financial results for the fourth quarter and full year ended December 30, 2020. Fourth Quarter 2020 and Recent Highlights Net revenues of 15.8 million, increased from 14.4 million in the third quarter, driven by increased sales of XP8 smartphone devices. 