IMPORTANT.

New radios do not use a genuine STM CPU, and the previously release firmware files will not work with this radio. However we have just found a solution to this problem and the updated firmware will be available soon

TYT / Retevis changed the CPU chip used in this radio, sometime at the end of 2022, which made it incompatible with the firmware. The new radios have an unmarked clone of the STM32F405VGT CPU, which is not compatible with the OS (FreeRTOS) which the firmware uses.


How to install OpenGD77 firmware onto the TYT MD-UV380 / Retevis RT-3S

See.
https://www.opengd77.com/viewtopic.ph...

Note.

This is Alpha level firmware. Not all functionality from the GD-77 version is currently functional