China Mobile Secret Codes

Default user code-1122,3344,1234,5678
Engineer mode :*#110*01#
Factory mode :*#987#
Enable com port:*110*01# -> Set UART -> PS confing ->UART1/115200
Restore Factory setting :*#987*99#
LCD Contrast :*#369#
Software Version :*#800# , *#900#
Set Default Language :*#0000# send , *0044# send
Set Default Language(new firmware) :*#001# send