SECRET CODE OF CHINA MOBILE

*#66*# Set Factory Mode CONFIRMED

*#8375# Show Software Version CONFIRMED

*#1234# A2DP ACP Mode CONFIRMED

*#1234# A2DP INT Mode CONFIRMED

*#0000#  and press ‘Send’ : Set Default Language CONFIRMED

*#0007# and press Send : Set Language to Russian CONFIRMED

*#0033# and press Send : Set Language to French CONFIRMED

*#0034# and press ‘Send’ : Set Language to Spanish CONFIRMED

*#0039# and press ‘Send’ : Set Language to Italian CONFIRMED

*#0044# and press ‘Send’ : Set Language to English CONFIRMED

*#0049# + Send : Set Language to German CONFIRMED

*#0066# and press ‘Send’ : Set Language to Thai CONFIRMED

*#0084# and press ‘Send’ : Set Language to Vietnamese CONFIRMED

*#0966# and press ‘Send’ : Set Language to Arabic CONFIRMED

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

Hope all these secret codes are useful to you.if you know any other tricks please post a comment to let others know.

NOTE: Not all of these codes will work for your particular phone. Try these codes at your own risk!