Warning: Do not unplug the radio during this process, or you may "brick" the device.
You might be thinking, "My radio works out of the box. Why risk an update?" Here are five compelling reasons: baofeng dm1702 firmware update
Ensure your programming cable drivers are installed. Plug the cable into the PC. In Windows Device Manager (under Ports (COM & LPT) ), it should appear as a COM port (e.g., COM3 or COM5 ). Note this number. Warning: Do not unplug the radio during this
Updating the bootloader is riskier than updating the main firmware. If the bootloader corrupts, the radio cannot enter DFU mode, and you must have an external ST-Link programmer. Stick to updating only the firmware.bin or .sgl file. the radio cannot enter DFU mode