I got my iphone 3GS 32GB- bought it brand new boxed from an ad in paper, collected and paid cash. It was unlocked not sure using what but it accepted my T-mobile UK sim card fine.
Now i think the guy who sold it has done an insurance claim as now even though i get full reception and it shows t-mobile the phone blocks incoming and outgoing calls basically all comms. I can use wi-fi etc etc but no phone features.
Can someone help or do i need to change the imei i don't have a clue.
If someone can help me out i would be very greatful.