China mobile latest codes
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#
Sendset English
language : *#0044#
Sendset English
language : *#001#