The Baofeng DM1702 is a popular choice for amateur radio operators who want a dual-band, dual-mode (Analog and DMR) handheld transceiver without breaking the bank. However, like many Chinese radios, the stock firmware shipped from the factory is often a "minimum viable product." To unlock the true potential of your DM1702—or simply to fix persistent bugs—performing a Baofeng DM1702 firmware update is essential.
Run the loader. It will detect your radio in DFU mode. Select the OpenGD77 firmware file (for the DM1702, not the GD-77). Click "Write to Flash." The loader will first erase the stock firmware, then write the new one. baofeng dm1702 firmware update
Use the official Baofeng CPS to read your radio and save your codeplug (channels, contacts). OpenGD77 uses a different codeplug format, but you can export your channels as CSV. The Baofeng DM1702 is a popular choice for
(Same as above: PTT + Monitor button while powering on). It will detect your radio in DFU mode
Go to the official OpenGD77 site and download the latest OpenGD77_Loader.exe .
Open the "Baofeng Firmware Upgrade Tool." Select the correct COM port (check Windows Device Manager under "Ports").
Connect your programming cable to the PC (do not connect to the radio yet). Install the drivers for the cable. For FTDI cables, use the latest Virtual COM Port drivers from FTDIchip.com.