restore downgadee ios 4.3.1 to 4.2.1

Discussion in 'Jailbreaks and iOS Hacks' started by Mimi Kebabu, Apr 19, 2011.

  1. Mimi Kebabu macrumors newbie

    Joined:
    Apr 19, 2011
    #1
    I'm trying to downgrade my iphone 3gs 4.3.1 to 4.2.1.
    I did all steps correctly, but I cannot find 4.2.1 on itune when i restore it.
    I have it on my desktop as zip file, but it does no show up when I open custome restore on itune.

    Please help me to restore downgraded ios.
     
  2. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #2
    You have to download it as a .ipsw file, not zip.
     
  3. iPhone Addict macrumors 6502

    Joined:
    Jun 18, 2009
    Location:
    San Francisco, CA
    #3
    You can find official IPSWs for Apple firmware from iclarified.com.
     
  4. Mimi Kebabu thread starter macrumors newbie

    Joined:
    Apr 19, 2011
    #4
    Thank you for asnwering my question.

    Everytime I tried to download it, it was automatically downdoaled as zip file.
    How I can downloaded as ipsw?
    Is there anyway to change zip to ipsw?
     
  5. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #5
    Change the extension before you download it from .zip to .ipsw
    Then on the drop down Save as type: all files
    And click save.
     

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