I've 2280 postpaid with outgoing barred....... i just tried *228 to check if gsk could work but it says the phone is already active and doesnt ask for the pin.. that means a gsk cant be used with a active postpaid (as earlier discussed in the forum also)... now i wnat to know will it be useful if i format the handset with above technique (*#7370# ) and than try prepaid gsk on it (*228) plz help....