Sonim Introduces First Remote Speaker Microphones with Channel Selector for PTT-over-Cellular Solution that Supports up to 96 Unique Channels

• RSMs with 10- and 16-channel selectors work with Sonim XP8 and XP5s rugged phones
• Fully compatible with ESChat PTT service

Austin, Texas (July 22, 2020) — Sonim Technologies™ (Nasdaq: SONM) launched the Stone Mountain Phoenix Epic Remote Speaker Microphone (RSM) with 10-Channel Selector and the Klein Valor RSM with 16-Channel and Volume Selectors that are compatible with the Sonim XP8 and XP5s rugged phones. These RSMs, when combined with the Sonim handsets and ESChat PTT service, provide the first cellular-based PTT solution that lets customers program up to 96 unique channels to the channel selectors on the RSMs.

These ultra-rugged accessories are designed with the first responder and industrial worker in mind, offering a complete hands-free communications experience on Sonim’s handsets. For example, the ability to support up to six zones and up to 96 channels from the RSM channel selector, allows public safety agencies and enterprises to set up users by geography, department or function, providing a form of speed dial for critical communications.

“We are excited to bring an LMR-like experience for the first time to a broadband