On the stand-by screen, type the code or number below, so can see something about your NOKIA mobile information and command.
*#0000# - See the SW version
*#06# - See the IMEI number
*3370# - Enhanced Full Rate: ON
#3370# - Enhanced Full Rate: OFF
*4720# - Alternative sound quality: ON (This is will waste the battery energy)
#4720# - Alternative sound quality: OFF
*#7780# - Back to default factory settings
*#7760# - Production serial number
*#2820# - Bluetooth Address
*#73# - Reset phone timers and game scores.
*#7370925538# - Delete all the content of the wallet and the wallet code.
*#7370# - Soft format — erases all telephone memory.
[Green]*3 - Hard format — if only the telephone memory is formatted, puts back the attitudes and reboots
