To check IMEI (International Mobile Equipment Identity) for any mobile On the main screen type *#06#

Information you get from the IMEI (International Mobile Equipment Identity)
XXXXXX     XX     XXXXXX    X
TAC      FAC       SNR     SP

TAC = Type approval code of your Nokia Mobile
FAC = Final assembly code of your cell phone
SNR = Serial number of your Nokia Phone
SP = Spare