iOS 4.0 iPhone 3GS 4.0 downgrade

Discussion in 'iOS Jailbreak & Cydia' started by iPhone_Anyone?, Jun 24, 2010.

  1. iPhone_Anyone?

    iPhone_Anyone? New Member

    Oct 20, 2007
    Likes Received:
    iPhone 3GS (White)
    alright so i have an iPhone 3GS on 3.1.2 unlocked and jailbroken. I know that Ultrasn0w is updated to work on all the basebands to this date. but there isnt an offical jailbreak for 4.0. so i was planning to just restore to the new 4.0 firmware just to see the new features, but then downgrade back to 3.1.2 for the jailbreak and unlock. is this possible with my shsh blobs backed up? i already changed my hosts file. i would like to stay on 4.0 but i cant access the unlock (even though its out already), because i cant jailbreak 4.0, other wise i would get the unlock. so is this possilbe just to see the new features?


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