Radioddity GD-77
VHF/UHF Handheld DMR Radio – 5W FM – Mono Graphic Display – Dual Band – 2 Meters and 70 cm – 136-174Mhz and 400-470Mhz
DMR ID Registration and Modification for Hams Only:
https://www.radioid.net/
Stock CPS & Firmware

Manufacturer Product Page:
Radioddity – GD-77 DMR Radio
Manufacturer Support Download Page:
Radioddity – Download Page
Open CPS & Alternative Firmware

OpenGD77 Alternative CPS & Alternative Firmware:
https://opengd77.com/index.php
Project was started by Roger Clark VK3KYY of Melbourne, Australia.
https://www.rogerclark.net/
Alternative Open Source Amateur radio firmware for:
Radioddity GD-77
Radioddity GD-77S
Baofeng DM-1801 V1 – [DISCONTINUED]
Baofeng DM-1801A – [DISCONTINUED]
Radioddity X Baofeng RD-5R – [DISCONTINUED]
TYT MD-9600 / Retevis RT-90
TYT MD-UV380 / Retevis RT-3S
Baofeng DM-1701 / Retevis RT-84

OpenGD77 Quick Start Chart and User Guide:
GitHub – OpenGD77_UserGuide HTML
GitHub – OpenGD77 Quick Guide Graphic.jpg
GitHub – OpenGD77_User_Guide.pdf