There are number of cheat codes for nokia mobiles that can help you in number of ways.
Some of them are as follows…

  • *#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# To show Bluetooth device address.
  • *#746025625# Sim clock allowed status.
  • #pw+1234567890+1# Shows if sim have restrictions.
  • *#3370# Enhanced Full Rate Codec (EFR) activation.
  • *#4720# Half Rate Codec activation.
  • *#4720* Half Rate Codec deactivation. The phone will automatically restart
  • *#7328748263373738# resets security code.