There is nothing more frustrating than a DMR transmission that breaks up or stutters. Firmware updates often tweak the audio buffering and PLL (Phase-Locked Loop) stability.

You will see a progress bar. Do not touch any buttons.

: After flashing, if the screen does not turn on, hold the OK (top-left green key) while powering on to initialize the new firmware. Identifying Your Firmware Branch

If you are comfortable troubleshooting COM ports and navigating sparsely documented software, the firmware update is highly recommended. It polishes a rough-around-the-edges radio into a much more reliable tool. However, for those who want a seamless, automated update experience, the DM-1702 might feel like a chore.