HT202340: iPhone: Understanding SIM cards

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ssalac16
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Q: i had my phone unlock while i was outside US. when it returned in the US, i immediately replaced the sim card to my old one. it was working fine until i updated the softwar. now my phone is not working and i keep getting a NO SIM card meassge. help!

i had my phone unlock while i was outside US. when it returned in the US, i immediately replaced the sim card to my old one. it was working fine until i updated the software. now my phone is not working and i keep getting a NO SIM card meassge. help!

iPhone 3GS

Posted on Jul 9, 2012 12:32 PM

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ssalac16

Q: i had my phone unlock while i was outside US. when it returned in the US, i immediately replaced the sim card to my old one. it wa ... more

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  • by KiltedTim,

    KiltedTim KiltedTim Jul 9, 2012 12:48 PM in response to ssalac16
    Level 9 (56,508 points)
    iPhone
    Jul 9, 2012 12:48 PM in response to ssalac16

    ONLY the carrier the phone is locked to can authorize unlocking it. If you did not have it unlocked by AT&T following their procedures, you did not have it "unlocked" you had it "hacked".

     

    It is now most likely a brick.