iPhone Jailbreak / Unlock 3GS 4.3.1 to 5.1.1?

Discussion in 'Jailbreaks and iOS Hacks' started by AmTechFox, Nov 14, 2012.

  1. AmTechFox macrumors member


    Jun 6, 2010
    I've got a 3GS locked to O2 (UK), on 4.3.1. Baseband 5.16.02.

    Whats the best way to unlock it? Do I need to update the iOS first, then jailbreak it?

    I did try updating to 5.1.1 but iTunes wont allow it, says not eligible, any suggestions guys?

  2. PsstGreek macrumors 68040


    Oct 21, 2010
    Tampa Bay
    You can either update to the iPad baseband, then downgrade back to 5.13.xx and unlock with ultrasn0w after jailbreaking.

    Or, you can try and see if o2 will unlock the iPhone for you. You may have to pay for it.
  3. Applejuiced macrumors Westmere


    Apr 16, 2008
    At the iPhone hacks section.
    Before you attempt to install the ipad bb and then downgrade it to unlock it make sure your 3GS is compatible.
    Post the first 5 digits of your serial number.
    if its not compatible you can cause permanent damage to it and fry all wireless radios inside if you install the ipad bb.

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