After flashing new firmware, the memory is usually wiped. You must program your frequencies.
You have updated the firmware. Now, you need to make the radio usable. baofeng dm1702 firmware update
Interesting note: Some DM-1702s ship with a hidden “engineering mode” accessible by Menu -> 6 -> 7 -> 7 -> 7 -> 7 -> 7 (seven times). From there, you can dump the original firmware over serial — no ST-Link required — but you can’t write back without the programmer. After flashing new firmware, the memory is usually wiped
The radio must be in a specific bootloader state to accept new firmware: Turn the radio . Now, you need to make the radio usable
| Problem | Likely Fix | | :--- | :--- | | Tool sees no radio | Wrong COM port; bad cable; radio not in Update mode (try key combo again). | | Tool freezes at 0% | Driver mismatch. Uninstall old drivers, install Silicon Labs CP210x drivers. | | "Device descriptor failed" | Use a USB 2.0 port (not USB 3.0). Also try a powered USB hub. | | Radio won't power on after update | Battery pull reset failed. Remove battery for 1 minute. If still dead, you need recovery mode (re-run update with radio off, holding PTT). |
The Baofeng DM-1702 is a dual-band DMR/Analog handheld that stands out for having a and an open-source firmware option (OpenGD77) . Updating its firmware isn't routine — but when done right, it transforms the radio.