nokia cheat codes

WARNING- Using secret codes may be harmful to your phone and result in disabling or worse. Use these codes at your own discretion, we accept no responsiblility for blocked pones while using these codesIMEI Number
*#06# Cells Identity Code (IMEI = International Mobile Equipment Identity)
XXXXXX XX XXXXXX X
TAC FAC SNR SP
TAC = Type Approval Code (first 2 digits = country code of the approval-country )
FAC = Final Assembly Code: (01,02 = AEG)

(10,20 Nokia)
(40,41,44 Siemens)
(30 Ericsson)
(50 Bosch)
(51 Sony,Siemens,Ericsson)
(60 Alcatel)
(65 AEG)
(70 Sagem)
(75 Dancall)
(80 Philips)
(85 Panasonic)
SNR = Serial Nr.
SP = Spare (always "0"
Software Version
*#0000# shows the software version
Signal Processing
*3370# - Enchanced full Rate Codec (EFR) activation. It will automatically restart.
#3370# - Enchanced full Rate Codec (EFR) deactivation
*4720# - Half Rate Codec activation. It will automatically restart.
#4720# - Half Rate Codec deactivation
Enchanced Full Rate will give you much better sound quality when you enable it. The new Enhanced Full Rate CODEC adopted by GSM uses the ASELP (AlgebraicCode Excitation Linear Prediction) compression technology.