How does ATT factory unlock iPhones?

Discussion in 'Jailbreaks and iOS Hacks' started by h4lp m3, Jun 22, 2012.

  1. h4lp m3 macrumors 6502

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  2. pdjudd macrumors 601

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    #3
    Basically they add your device ID number to their database of devices that are considered unlocked. Once the device pings the mother ship, your device gets unlocked.
     
  3. dhlizard macrumors G4

    dhlizard

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    #4
    They have the IMEI number added to Apple's whitelist server for IMEI unlock.
     
  4. h4lp m3 thread starter macrumors 6502

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    #5
    So the phone pings Apple before it connects to ATT or Verizon?
     
  5. ZCherub macrumors 6502a

    ZCherub

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  6. gd6 macrumors member

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    #7
    Your susposed to restore the phone in itunes before it is unlocked. It is during the setup after the itunes restore that the phone checks in with apple and is activated as an unlocked iphone.

    I'm pretty sure thats how it works.
     
  7. dhlizard macrumors G4

    dhlizard

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    #8
    After you deactivate your phone or restore your firmware, when the phone re-activates, the unlock is attached.
     
  8. cyclone84 macrumors regular

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    #9
    I did this yesterday for my JB iPhone 4 on 5.0.1

    Steps:

    1. Call at&t and ask to have your out of contract iPhone unlocked. You must provide IMEI.
    2. Wait for email from at&t with instructions.
    3. Do not follow instructions.
    4. Download and run latest Redsn0w.
    5. Click 'Jailbreak' (you won't actually be jailbreaking), put phone in DFU mode, and let the tool apply the Limera1n exploit.
    6. Uncheck all items except "Deactive". Make sure you do not check 'Install Cydia'.
    7. Click 'Next'.
    8. Upon reboot, open iTunes to reactive phone and verify unlock.

    *Note that the Redsn0w steps may be slightly different if you're on 5.1.1 (e.g. no DFU mode required) but the tool is pretty explicit about this.
     
  9. lapeno macrumors 6502

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  10. dhlizard macrumors G4

    dhlizard

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    #11

    Or you can just use SAM to deactivate, then plug it into iTunes and the unlocked banner will pop right up.
     
  11. CoachStall macrumors 6502

    CoachStall

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    #12
    what is SAM?
     
  12. dhlizard macrumors G4

    dhlizard

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    #13
    A Cydia hack, search for SAM in Cydia
     
  13. iTunen macrumors newbie

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    #14
    So I did this and the "Congratulations, your iPhone has been unlocked" screen is there on my iTunes screen. Under the "Congrats..." message it says "To set up and sync this iPhone, click Continue". Assuming I don't want to restore, should I click on "Continue" or just disconnect my phone from iTunes now?
     
  14. dhlizard macrumors G4

    dhlizard

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    #15
    Yes, doing so does not restore your phone
     
  15. iTunen macrumors newbie

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    May 30, 2012
    #16
    Thanks very much for the reply. I must admit that I went ahead (before I got your reply) and disconnected my iphone from itunes without clicking on the "Continue..." button and everything seems to be as it should be. I uninstalled ultrasnow from cydia, rebooted my 3gs, removed my original att sim card, installed an active t-mobile sim card, and voila, hooked right up, so the factory unlock is apparently working as should be.

    I don't know if I missed anything by not waiting for your response and disconnecting from itunes rather than clicking on the "Continue..." button, but so far so good.

    Using SAM to deactivate and then connect to itunes was a real good tip and time saver since I did not have to restore my phone and go through all that hassle. Now I have a 3GS jailbroken with Snowbreeze, factory unlocked, on ios 4.3.3 and modem firmware 05.13.04 with all the stuff I use working just fine. :) Can't decide if it would be worth it on this phone to upgrade now to ios 5.1.1 and then jb again or not. Thoughts welcome.
     
  16. dhlizard macrumors G4

    dhlizard

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    #17
    Nope, it's just a re-registration of the phone.
     
  17. hkpuipui99, Jun 27, 2012
    Last edited: Jun 27, 2012

    hkpuipui99 macrumors member

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    #18
    Wow that was easy! Thanks!
     
  18. hackthatphone macrumors 68000

    hackthatphone

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    #19
    In our case we didn't want to restore and didn't want to jailbreak the iphone.

    I used an old program called iphone tool. Told it to deactivate the iphone, then all we did was connect it to itunes with the new sim and it was unlocked.

    Quick and easy.
     

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