China Mobile Secret Codes

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
Change Screen Language:
* *#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