China mobile secret codes

I think how got the china mobile r trying to know the default passwords etc., codes of it i got some of the secret codes try it

-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
-Default user code : 1122, 3344, 1234, 5678

i think is use full to u