After publishing Secret codes for Nokia handsets i am putting following codes for Chinese handsets. I have tested these codes on few on Chinese Made handsets, and they seem working. But due to the fact that there are hundreds of models available for Chinese Handsets, there are chances that these codes may not work on your phone. Let me know in that case…!
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#
set English language: *#0044#
set English language (new firmware): *#001# Send