iPhone 3GS 4.2.1 (official) want to downgrade to 4.1 (and then jb it)

Discussion in 'Jailbreaks and iOS Hacks' started by cmm, Nov 26, 2010.

  1. cmm macrumors 6502a

    Joined:
    Apr 30, 2006
    Location:
    Manhattan & Zürich
    #1
    Hi,

    I thought I could jb 4.2.1 and get the tethering hack to work without issues. Well, I was wrong. In any case, I had some issues and had to restore to an official 4.2.1 iOS. How can I get back to 4.1 so I can jb and then apply the commcenter tethering hack? (I am on AT&T)

    I have an shsh blob saves called *-iphone-4.1.shsh. (I also have iphone-4.2b3.shsh and iphone-4.2.1.shsh)

    Thanks!
     
  2. Benji222 macrumors 65816

    Benji222

    Joined:
    Dec 21, 2009
    Location:
    So Cal
    #2
    First you will need your ipsw for your current phone. You can find and download from this reliable source(not advertising, just did it yesterday from here so I know its legit and wont waste your time + the site is great for news :p)
    http://www.iphonedownloadblog.com/iphone-downloads/

    Get TinyUmbrella
    Push Get SHSH Blobs (Save SHSH)
    Close iTunes(if open) and TinyUmbrella
    Open Tiny Umbrella, hit Start TSS server
    Then open iTunes,
    Plug phone in(doesnt matter if it was in before)
    Shift and click restore (for Windows!) or option click( for Mac) on restore. Then you should be able to navigate to the ispw you downloaded.
    Then click it and restore. It will be downgraded!

    If you need more instruction or download links to tiny umbrella or the jailbreak programs let me know!

    Then grab greenpoisi0n or limera1n and rejailbreak!
    Make sure to run those as admin, caused me a lot of trouble yesterday >.>
     
  3. cmm thread starter macrumors 6502a

    Joined:
    Apr 30, 2006
    Location:
    Manhattan & Zürich
    #3
    Hey, thanks!

    I have an ipsw when I jb 4.1 - can I use that? Here's the filename: iPhone2,1_4.1_8B117_Custom_RestoreCcmmiPhone3GS.ipsw
     
  4. Benji222 macrumors 65816

    Benji222

    Joined:
    Dec 21, 2009
    Location:
    So Cal
    #4
    Thats for pwnage tool which I have never used and have no idea how to. Is your phone unlocked? (Used on other carriers?)
     
  5. cmm thread starter macrumors 6502a

    Joined:
    Apr 30, 2006
    Location:
    Manhattan & Zürich
    #5
    No.
     
  6. Benji222 macrumors 65816

    Benji222

    Joined:
    Dec 21, 2009
    Location:
    So Cal
    #6
    then just redownload a fresh official ispw to downgrade too and do it through the methods above.
    That custom one may work, but i have no idea.
     
  7. eastercat macrumors 68040

    eastercat

    Joined:
    Mar 3, 2008
    Location:
    PDX
    #7
    Do you have pwnage or redsnow? You might have to go through pwnage (if you have a mac) or redsnow (if you are windows).
    FYI: pwnage isn't used for unlocking. Ultrasnow is used for unlocking.
     

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