2 ******NOKIA Secret Codes******

*#06# for checking the IMEI (International Mobile Equipment Identity).
*#7780# reset to factory settings.
*#67705646# This will clear the LCD display (operator logo).
*#0000# To view software version.
*#2820# Bluetooth device address.
*#746025625# Sim clock allowed status.
*#62209526# – Display the MAC address of the WLAN adapter. This is available 
*#3370# – Enhanced Full Rate Codec (EFR) activation. Increase signal strength, better signal reception. It also help if u       want to use GPRS and the service is not responding or too         slow. Phone battery will drain faster though.
*#3370* – (EFR) deactivation. Phone will automatically restart. Increase battery life by 30% because phone receives less         signal from network.
*#4720# – Half Rate Codec activation.
*#4720* – Half Rate Codec deactivation. The phone will automatically restart
*#7328748263373738# - resets security code.
                                                          
Default security code is 12345
*#1471# Last call (Only Vodafone)
*#21# Allows you to check the number that “All Calls” are diverted to
*#30# Lets you see the private number
*#43# Allows you to check the “Call Waiting” status of your phone.
*#62# Allows you to check the number that “Divert If Unreachable (no service)” calls are diverted to
*#67# Allows you to check the number that “On Busy Calls” are diverted to
*#67705646# Removes operator logo on 3310 & 3330
*#73# Reset phone timers and game scores
*#746025625# Displays the SIM Clock status, if your phone supports this power saving feature “SIM Clock Stop               Allowed”, it means you will get the best standby time             possible
*#7780# Restore factory settings
*#8110# Software version for the nokia 8110