Trick->> चाईना मोबाईल के सिक्रेट कोडस 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#
