NOKIA Mobile's Secret Codes

Hi Friends, Today I Am Giving You,Nokia Mobile Secret Codes.Which You Have To Press On Your Mobile.Means Just Type As You Write Your Friend's Number For Calling Him.Same Process Is Applied Here. NOKIA MOBILE SECRET CODES: Dial *#0000# To Check Your Mobile's Firmware And Date. Dial *#06# To Display Your Mobile's IMEI Number. Dial *#92702689# To Display Your Mobile's Lifetimer. Dial *4720# For Activating Call Rate Bandwidth. Dial #4720# Deactivate Call Rate Bandiwdth. Dial *3370# Deactivate EnhanceFull Rate. Dial #3370# Deactivate EnhanceFull Rate. Dial *#746085685# To Display SimClock Status. Dial *#7220# Activate GPRS PCCCH( Packet Common Control Channel) Support. Dial *#7230# To Deactivate PCCCH Support. Dial *#7760# Display Manufacturing Serial Number. Dial *#67705646# To Set Operator Logo To Default. Dial *#7370925538# To Reset Mobile Wallet. Dial *#7370# Soft Format Mobile Memory. Dial *#7780# Full Format MobileMemory. Some codes may not work on different handsets..