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Discuss version 3.0 software at the iOS 3.x (iPhone OS 3.x) - Hackint0sh.org; i updated my 2g iphone to version 3.0. is there a way to downgrade back ...
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    Default version 3.0 software

    i updated my 2g iphone to version 3.0. is there a way to downgrade back to 2.2?



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    I have done it a couple times. You need to use a pwned custom firmware. Either winpwn or the pwnage tool will work but trying to restore to a previous non-pwned firmware will stop half way through. Be sure you put your phone into DFU mode before installing the firmware you create. Good luck, it might take a try or two

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    the methodology is also a bit different dependent if you are mac or pc, going straight to an pwned firmware in downgrade didnt work for me i had to personally downgrade to a vanilla firmware from DFU and then use iRecovery to get it to boot back into normal mode after the install "failed" (this is on a mac) if you are on a mac be sure to disregard any instructions that say "use quickpwn" because quickpwn will not recognize an iPhone in recovery or DFU on the mac. these are the exact steps i followed to get from 3.0bx to an pwned 2.2.1 on my mac

    1. DFU mode (NOT recovery mode)
    2. Restore to vanilla 2.2.1 (get 1015 error)
    3. Download and extract iRecovery. This is a console app to be run in terminal. Extract it with finder.
    Copy libusb-0.1.4.dylib to /usr/local/lib and chmod both iRecovery and the dylib to 755 using chmod 755 /usr/local/lib/libusb-0.1.4.dylib and chmod 755 iRecovery.
    In terminal, run iRecovery -s
    At the iRecovery prompt, type: fsboot
    Wait, iPhone should boot. If not, type fsboot a second time.
    ctrl-c or close the term. You are done with iRecovery.

    after this your phone should work. (thanks to mocque for the iRecovery tip)

    4. DFU mode (NOT recovery mode)
    5. restore to pwned 2.2.1 ipsw

    you may also need to downgrade certain usb components or plug in your iPhone through a hub in 10.5.6 to get iTunes to work properly with the iPhone in DFU.

    http://www.hackint0sh.org/forum/f173/60659.htm

    it could also take a try or two, but if you follow those directions verbatim you should be good to go (on a mac anyway, the steps are mostly on the same on a PC except quickpwn is used to get the iPhone out of dfu/recovery mode after the downgrade "errors" out
    Last edited by nitosoft; 04-28-2009 at 04:48 PM.

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    Quote Originally Posted by nitosoft View Post
    2. Restore to vanilla 2.2.1 (get 1015 error)
    why would you get a 1015 error ?
    2G iphone with 3.0 fw going back to 2.2.1 fw should be ok.
    Am i missing something ?
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    this is for 3g, i dont know if its different for 2g i dont have a 2g anymore


 

 

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