1: *#06# For checking the International Mobile Equipment Identity (IMEI Number) . This can be used with almost every Mobile Phone i.e Samsung, SE, LG etc.
2:*#30# Lets you see the private number.
3:*#7780# Restore factory settings. With Some Models *#7370#
4:*#0000# To view software version.
5:*#73# Reset phone timers and game scores
6:*#2640# Displays phone security code in use .