All CHINESE Mobile Secret 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# Send
set English language: *#0044# Send
set English language (new firmware): *#001# Send


More some codes for reset mobile china
*#77218114#
*#881188#
*#94267357#
*#9426*357#
*#19912006#
*#118811#
*#3646633#