2 Replies Latest reply: Oct 21, 2012 6:45 AM by KannaSL
KannaSL Level 1 Level 1

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?

iPhone 3GS, iOS 4.1
  • Rudegar Level 7 Level 7

    sounds to me like the update have sim locked your phone

    if it was jailbroken that would happen contact your carrier or the carrier it was  originally sim unlocked

  • KannaSL Level 1 Level 1



    Thank you for your response.


    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?