You may have some doubts about how to repair your mobile yourself when the mobile had gone or failed due to technical work of your mobile.You must submit that mobile to your nearer mobile care and they just apply these below codes and then they charge you more amount to do that
I had verified and tested these China mobile codes and been updated.
Enjoy the codes. Try it your self.
Default user code : 1122, 3344, 1234, 5678
Engineer mode : *#110*01#
Factory mode : *#987#
Enable COM port : *#110*01# | Device | Set UART | PS Config | UART1/115200
Restore factory settings : *#987*99#
LCD contrast : *#369#
Software version : *#800#
Software version : *#900#
Set default language : *#0000# Send
Set English language : *#0044# Send
Set English language (new firmware) : *#001# Send
