How do I downgrade 4.0.2 to 4.0?

Discussion in 'iPod touch' started by josh0610, Sep 26, 2010.

  1. josh0610 macrumors newbie

    Joined:
    Jul 28, 2010
    #1
    Im trying to downgrade my iPod Touch from 4.0.2 to 4.0 in order to jail break. I've tried the whole TinyUmbrella process, but it still says I am on 4.0.2.:confused:
    Can anyone tell me how to successfully downgrade? :)
     
  2. tadad1 macrumors 6502a

    tadad1

    Joined:
    Oct 20, 2008
    #2
    Unless you used tinyumbrella to back up your SHSH blobs for 4.0 you can't.
     
  3. josh0610 thread starter macrumors newbie

    Joined:
    Jul 28, 2010
    #3
    So basically what you're saying is, I would have needed to back up my SHSH blobs when I was on 4.0? I have downloaded 4.0 firmware, would this help?
     
  4. tadad1 macrumors 6502a

    tadad1

    Joined:
    Oct 20, 2008
    #4
    That's right, you need blobs for 4.0 if you want to downgrade to it.
     
  5. vmelkon macrumors newbie

    Joined:
    Aug 24, 2010
    #5
    I was able to do it without generating a blob. It generates a blob by itself anyway. I had to try it 20 times and after 1.5 hours, it worked. It is very poky or needs some specific sequence of steps. I don't know.
    Also, when I did it. I lost all my apps. I had to redownload the apps. Not really a problem for me since they are all free stuff.

    I am now updating to 4.1 :)
     
  6. kelving525 macrumors regular

    Joined:
    Jul 21, 2008
    Location:
    NYC
  7. grapes911 Moderator emeritus

    grapes911

    Joined:
    Jul 28, 2003
    Location:
    Citizens Bank Park
    #7
    Not exactly. You needed to save your SHSH blobs while Apple was still signing them. Apple stopped signing 4.0 shortly after 4.0.1 was released. It has nothing to do with which version is on your device.
     

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