hi guys, i recently purchased a iphone 3g of a friend, it was possibly barred on 02, i have updated it to ios 4.0 and its on basband 5.13.04, ive jailbroken it and unlocked it. it reconizes my t-mobile sim and has strong signal but it wont call out or text and i cant recieve them either. Does this mean it is blocked completely to all networks.