Major firmware updates occasionally wipe the internal flash memory. Simply open your saved codeplug from Step 2 and click Write to Radio to restore all channels, digital contacts, and zones. If you want to optimize your radio setup, let me know: What firmware version you are currently running
: Perform a factory reset via the radio menu (Menu > Utilities > Radio Settings > Factory Reset) if the firmware allows, then rewrite your codeplug. baofeng dm1702 firmware update