Invalid SIM on iPhone 3GS

Discussion in 'iPhone Unlocking' started by unbubblelivable, Oct 18, 2011.

  1. unbubblelivable

    unbubblelivable New Member

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    I restored and updated my iPhone 3GS to iOS 5 and I receive the "invalid SIM card" error. I replaced the SIM card and AT&T ensured me that wasn't the issue. I haven't jailbroken my phone, but I hear that may be the only solution? I'm stuck at the "invalid SIM card" screen though can go back to the "Restore" screen, but those are my only 2 options. Therefore, I'm unable to find out what the firmware is or any other details. Please be very descriptive with the steps for possible solutions!
    Thank you in advance!
     
  2. Jmills87

    Jmills87 Well-Known Member

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    If it says invalid SIM and you are on a factory firmware then it's definitely an issue with the SIM.
     
  3. unbubblelivable

    unbubblelivable New Member

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    I've tried 2 different SIM cards though and that didn't fix it. Would unlocking/jailbreaking fix it? If so, how would I go about doing that?
     
  4. Jmills87

    Jmills87 Well-Known Member

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    No, if its an official SIM and it's not working on a factory firmware, it's definitely not going to work on a jailbroken firmware. There's no need to unlock if you have an official carrier.
     
  5. unbubblelivable

    unbubblelivable New Member

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    Darn it. Well might as well try since the phone is useless anyways?
     

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