China Mobiles unlock secrect codes

Today every one knows that China Mobiles are hitting the market in a good speed. but does any one knows any codes of that mobile to get some other information about their device ? I dont think so. Weel but we have some of the codes that can be useful for the China mobile users. here they are :-
Enter into Engineering Mode: *#110*01#

Enter into factory Mode: *#987#

Restore Factory Settings: *#987*99#

Check Software Version: *#900# OR *#800#

Default User Codes: 1122, 3344, 1234, 5678

Change LCD Contrast: *#369#

To Enable COM Port: *#110*01# -> Device -> Set UART -> PS Config -> UART1/115200

Screen Language can also be changed in china Mobile Handsets:-
*#0000# + Send : Set Default Language

*#0007# + Send : Set Language to Russian

*#0033# + Send : Set Language to French

*#0034# + Send : Set Language to Spanish

*#0039# + Send : Set Language to Italian

*#0044# + Send : Set Language to English

*#0049# + Send : Set Language to German

*#0066# + Send : Set Language to Thai

*#0084# + Send : Set Language to Vietnamese

*#0966# + Send : Set Language to Arabic

All these codes have been taken from a respected mobile manufacturer company.