Is this what I should be doing? (New to jailbreaking)

Discussion in 'Jailbreaks and iOS Hacks' started by abhi4ever04, May 16, 2011.

  1. abhi4ever04 macrumors newbie

    May 16, 2011

    I have an iphone 4 (ATT) with 4.3.2 (8H7) firmware.
    - I would like to unlock it so that I can use it when travelling abroad.
    - Also I would like to restore it back to 4.3.2 (non jailbroken/ unlocked) when I come back.

    Based on my research the firmware that I need to preserve baseband (dont really know what that means) and unlock- I need to use 4.2.1 firmware and the Sn0wbreeze 2.2 and Ultrasn0w 1.2. as shown in this page:

    My questions for the experts are:
    1) Is this info/ process the best process out there to unlock?
    2) Can I downgrade from 4.3.2 to 4.2.1. using the firmware supplied on the page above to unlock my phone?
    3) Will this break my apple warranty?
    4) Will I be able to restore it back (restore from backup) to 4.3.2 when I return?

    Thanks a lot for your response.
  2. PsstGreek macrumors 68040


    Oct 21, 2010
    Tampa Bay
    If your iPhone 4's baseband (modem firmware) is anything higher than 1.59.00 it can't be unlocked with ultrasn0w. Your only option would be to buy a Gevey Turbo Sim to unlock.

    Don't use Sn0wbreeze. Use redsn0w instead to jailbreak or iPhone.
  3. abhi4ever04 thread starter macrumors newbie

    May 16, 2011
    My modem firmware says (04.10.01) which is way more than 1.59.00 :(

    Is there anyway I can go back to the 1.59.00?

    Thanks much.
  4. PsstGreek macrumors 68040


    Oct 21, 2010
    Tampa Bay
    Nope. Once the baseband is upgraded, it can never go back down.
  5. scirica macrumors 68020


    May 13, 2008
    Dallas, TX
    Yes, looks like you are going to need a Gevey unless you can convince someone in the UK to submit a hardware unlock request on your behalf.
  6. eastercat macrumors 68040


    Mar 3, 2008
    The factory unlock would have to be under the table. Because normally, UK providers aren't going to unlock another carrier's phone.
    Besides gevey, you can sell your iphone and buy a factory unlocked phone from a number of countries, including Canada. It's full price, but you will never lose your unlock because you updated the software.

    If you have the correct blob, you can downgrade the iOS (not the bb).

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