While updating my iphone 3GS to iOS 6 (from iOS 4.1) this msg popped up. "Only compatible sim cards from a supported carrier may be used to activate iphone......". I have been using this iphone with the existing sim card which wored perfectly. I'm is Sri Lanka and "Dialog" is my carrier network. What can I do to make my iphone work?
It was jailbroken. I bought it from someone. I have no idea what the carrier it was originally sim locked, neither do he. Should be a carrier from another country. So is there anyother way? can it be unbroken? or can I undone the update and get back to iOS 4.1?