*#06# for checking the IMEI (International Mobile Equipment Identity) Information you get from the IMEI:

XXXXXX XX XXXXXX X

TAC FAC SNR SP

TAC = Type approval code
FAC = Final assembly code
SNR = Serial number
SP = Spare

To access SIM-Locking menu of your phone, press: < * [CLR] <
Be carefull or you may lock your phone.