China Mobile Secret Code

Models CHINESE GENERAL 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 of English language (new firmware): * # 001 # Send
Another listing of Chinese Models distinct secret codes and details: