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Discuss Tutorial | How to downgrade from official os 3.0 back to 2.2.1 without error 1600. at the iOS 3.x (iPhone OS 3.x) - Hackint0sh.org; Anyone else get this to work...let us know thank you Originally Posted by rugburn WOW...nicely ...
  1. #11
    Amazingly Knowledgeable Array rugburn's Avatar

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    Anyone else get this to work...let us know thank you

    Quote Originally Posted by rugburn View Post
    WOW...nicely done with the Step by step...you put in some good work here. Now we just need someone to give us a confirmation....anyone want to try this and let us know
    iPhone 1.0.2 OTB->Virginized->1.1.4 FW->Winpwn FW 2.0.1 Quickpwn 2.0.1 to FW 2.2.1->RedsnOw->3.0 FW itunes3.0.1FW->RedsnOw 8 to unlock->RedSnow 0.9.2 upgrade to 3.1.2->iPhone 2g 3.1.2 and as of July 30th,2010->iPhone 4-32GB & iPhone 4-16Gb->Unlocked

    Can someone give me a thumbs up click on Reputation ...thanks

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    I believe that you also need to remove Apple Mobile Device Support from Add/Remove program control panel. Otherwise it still uses the iTunes 8.2 USB drivers... I think that is how I did mine when I got the 1600ish error. Also, I think I had to restore my phone in iTunes (I got the emergency only call/invalid SIM error) before I could unlock/jailbreak after I downgraded.

 

 
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