4gdong001 Firmware | 480p – UHD |

You cannot flash what you do not understand. Incorrect firmware will permanently brick the device. To check your version:

Supports downlink speeds up to 150 Mbps and uplink speeds up to 50 Mbps. 4gdong001 Firmware

If you can share (file name, device label, or log output), I can give a more targeted guide. You cannot flash what you do not understand