Retevis RT3 Firmware Upgrade How-To [Article+Video]

This is the Retevis RT3 Firmware Upgrade How-To article and video. On 19th December, Retevis issued a firmware upgrade for their Retevis RT3 and RT8 handheld DMR radios. The upgrade contains the following fixes/additions: Added 1750Hz transmit option to programmable side key. Fixed “crashes” of some LCD screens. (white screen …