If I update my 3GS to 4.0, will I lose my unlock?

Discussion in 'Jailbreaks and iOS Hacks' started by benflick, Jun 24, 2010.

  1. benflick macrumors 68020


    Jul 11, 2008
    Cincinnati, Ohio
    I have a new-bootrom 3GS on 3.1.3. Jailbroken with Spirit, Unlocked with Ultrasn0w. I want to update to 4.0, but I need an unlock. I don't need a jailbreak. I have the 5.13.04 baseband from 4.0, and I'm wondering if I update to 4.0, will my phone stay unlocked? I know you can uninstall Ultrasn0w from Cydia, and your iPhone will remain unlocked. I have updated the frimware on iPhones before, and they have stayed unlocked if the new firmware didn't include a baseband update.
    Before I try this, what do you think? It should work, especially if I update, not restore.
  2. Applejuiced macrumors Westmere


    Apr 16, 2008
    At the iPhone hacks section.
    It will NOT work.
    It will lock up again.
    You need to be JB to be unlocked on 3G and 3GS models.
    And with the new bootrom you have no option right now but to wait or go to official 4.0 and only use it with official carrier.
  3. thelatinist macrumors 603


    Aug 15, 2009
    Connecticut, USA
    No, you cannot unlock your phone unless it is jailbroken. If you rely on an unlock, you have to wait until a new tool comes out that can jailbreak your phone.

    By the way, the only iPhone that can be upgraded without losing its jailbreak is the 2G.

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