karbonn code
((1) *#06# this code show Emei Number
((1) *#06# this code show Emei Number
(2) *#110*01# this code show Enter into Engineering Mode
(3) *#987# this code show Enter into factory Mode
(4) *#987*99# this code show Restore Factory Settings
(5) *#900# this code show Check Software Version
(6) *#800# this code Check Software Version
(7) *#369# this code Change LCD Contrast:
Some Default User Codes here: 1122, 3344, 1234, 5678
To Enable COM Port: *#110*01# -> Device -> Set UART -> PS Config -> UART1/115200