The chipset differs (Balong V7 vs V9). You will destroy the radio module.
The string of characters "b311221" glowed on the terminal, a cipher waiting to be cracked. The room was dark, illuminated only by the harsh blue light of the monitor and the occasional spark from the overloaded server rack in the corner. b311221 unlock firmware link
If you are managing or attempting to update your device, these defaults are useful: 192.168.8.1 (most common) or 192.168.1.1 . The chipset differs (Balong V7 vs V9)
Access the web interface (usually 192.168.8.1 ) and find the "Local Update" section. Flash: Upload the file and wait for the router to reboot. b311221 unlock firmware link