Visit forums like Two Way Radio Forum or Facebook DM-1702 groups for links to specific, working firmware versions (.bin files), as official links are hard to find.
: This version typically requires software designed for the Retevis RT72 , as the internal hardware is nearly identical . baofeng dm1702 firmware update
Updating the firmware on your (also sold as the Baofeng DM-X Visit forums like Two Way Radio Forum or
With your device and computer prepared, you can proceed with the firmware update: working firmware versions (.bin files)