 AUSTIN, Texas, March 18, 2021 PRNewswire -- Sonim TechnologiesTM Nasdaq: SONM announced today the availability of the Stone Mountain Epic Remote Speaker Microphone RSM series as part of its rugged mobility accessory product line. The Epic RSM Series with ProClear TM Digital Signal Processing DSP noise cancellation is compatible with the Sonim XP8 and XP5s rugged phones. 