: Wait for the "Completed" or "100%" message before disconnecting or restarting the device. Safety Warning Flashing firmware carries risks. Always ensure:
: Allows users to select the specific COM port and baud rate (usually 115200) for the connection. Download GX6621 1TUNER 16MB Loader Tool rar
The firmware matches your specific hardware model (GX6621 1-Tuner). : Wait for the "Completed" or "100%" message