Trouble with carrier unlock

Discussion in 'iPhone' started by ben824, Dec 16, 2013.

  1. ben824 macrumors regular

    Joined:
    Jul 12, 2012
    Location:
    GA
    #1
    I unlocked a 3GS and sold it last week. I unlocked it through AT&T as I had done with a few other iPhones and that went well. Sold the iPhone and the person I sold it to said their SIM Card is not being accepted but the phone (yes it is the right size and it is on a GSM network). It keeps saying no SIM Card detected. Now all the other iPhones I had sold were almost instantly unlocked. This one keeps having issues. I instructed the buyer how to put the phone into DFU mode and do a full restore and it still isn't working.

    Now AT&T says it can take up to 7 days. Has anyone actually had it take that long?
     
  2. 617aircav Suspended

    Joined:
    Jul 2, 2012
    #2
    You should have made sure it was actually unlocked before selling it.
     
  3. PsstGreek macrumors 68040

    PsstGreek

    Joined:
    Oct 21, 2010
    Location:
    Tampa Bay
    #3
    Does the 3GS you sold have the iPad baseband on it?
     
  4. ben824 thread starter macrumors regular

    Joined:
    Jul 12, 2012
    Location:
    GA
    #4
    When I acquired it, it had a T-Mobile SIM card in it but would not go past the Apple logo upon start up. I did a DFU restore and got it to boot to the startup screen as a new phone. I assumed based on the fact it had a T-Mobile SIM card that it was unlocked. Likely I realize now it was probably a jailbreak unlock.
     
  5. ben824 thread starter macrumors regular

    Joined:
    Jul 12, 2012
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    #5
    Not sure. How could I find out and what would kind of affect would this have or not have?
     
  6. sammy-boy macrumors regular

    Joined:
    Nov 2, 2013
    Location:
    Staffordshire, UK
    #6
    Could it be the phone has developed a SIM card reader fault? Or the seller's SIM is a slightly dirty?
     
  7. PsstGreek macrumors 68040

    PsstGreek

    Joined:
    Oct 21, 2010
    Location:
    Tampa Bay
    #7
    The new owner would have to tell you. The modem firmware (baseband) would be shown in the about settings - 6.15.00

    The factory unlock wouldn't work properly if the baseband is altered to the iPad one.
     

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