Secret Mobile Code(Nokia,Sony Ericsson & Motorola)

Nokia
*#06# for checking the IMEI
*#7780 reset to faxtory seting
*#0000# To view software version
*#2820# Bluetooth device address

sony Ericsson
->*<-<-*<-* Secret Menu
*#06# IMEI Number
<-**<- Lock Status
(-> means press joystick to be right

Motorola

*#06# IMEI Number
[][][]004[]1[] Change Pin
[][][]119[]1[] Enable EFR
[][][]###[]1[] Function
Note
[]means the * key held in until boxappear