Hidden Secret China Mobile Phones Codes

The following Mobile Phones codes works with various China mobile Phones such as Alkatel, Sigmatel, Carboonn, GFive, and more suchChina Mobile phones.
–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