For a safe , gather the following:
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.
Regardless of which version you have, the preparation steps are the same.
Once complete, turn the radio off and back on to initialize the new firmware.
Before you begin the update process, ensure you have the following items:
Never write new firmware to your radio without saving your existing channels, zones, and digital contacts. Connect the programming cable to your PC and the radio. Turn the radio on. Open your Baofeng DM-1702 CPS software.
Click and save the resulting file to your desktop.
Once you have identified your radio version and have all the necessary files, you can begin the official update process. These steps are broadly similar for both versions.
Disclaimer: Firmware updates are done at your own risk. Incorrectly flashing firmware can cause permanent damage to your device.
Are you looking to install the or an open-source alternative like OpenGD77?