Common Codes for all NOKIA-GSM

--> *#06# Cells Identity Code (IMEI = International Mobile Equipment Identity)

XXXXXX XX XXXXXX X
TAC FAC SNR SP

TAC - Type Approval Code.
FAC - Final Assembly Code.
SNR - Serial Numer.
SP - Spare.


--> *#0000# shows the software version.

--> *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.

--> *#7220# Enable PCCCPH suppot (faster GPRS)
--> *#7230# DisablePCCCPH support

--> *#92702689# (*#war0anty#) opens a secret menu.