iOS 4.0 upgrade from 3.1.3 to 4.0.(1) (Help)

Discussion in 'iOS Jailbreak & Cydia' started by deathphoenix, Aug 20, 2010.

  1. deathphoenix

    deathphoenix New Member

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    hello everyone,
    I just got a new Ipod Touch 3G on 3.1.3 official FW from Apple cause my other one was broken. I want to jailbreak it on iOS 4 with JailbreakMe.com .
    But, i can only upgrade 4.0.2 with iTunes, but u cant jailbreak at 4.0.2 right?
    On 3.1.3 JailbreakMe.com crashes and my device either reboots or safari crashes
    So i gotta upgrade it to 4.0 or 4.0.1 in some kind of way...
    I probably have the 4.0.1 firmware and i guess also a restore on my PC, if necessary, somewhere from my previous ipod but i dont know where iTunes save that.

    So does anyone know how i could upgrade from 3.1.3 to 4.0/4.0.1?

    Thanks...
  2. mikeac

    mikeac Member

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    You have a 2GB MC model, sooo... you need your SHSH blobs for 4.0 to update to 4.0.

    You might want to look on how to save your SHSH blobs and a downgrade guide (it works for upgrading if you have your blobs).

    Not sure if this will work, I think it's less than likely that it will.
  3. oookkaaaaay

    oookkaaaaay Member

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    Download Firmware 4.0.1 on your computer then Shift+Restore on iTunes. Pick the 4.0.1 Firmware. I am pretty sure apple is still signing 4.0.1 I just restored to it from 4.0 two days ago.
  4. b-mac 39

    b-mac 39 Well-Known Member

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    They stopped signing it about 21 hours ago according to MuscleNerd.
  5. deathphoenix

    deathphoenix New Member

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    Thanks for the replies!

    So i got to save my SHSH blobs and follow a downgrade guide?
    If so should i follow that guide from 3.1.3 or first update to 4.0.2 and then follow the guide?
  6. iDestiny

    iDestiny Well-Known Member

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    Restore your iPod to iOS 4.0 firmware. Shift+click downloaded .ipsw, once you've redirected hosts file.
    You have an iTouch so you can't use 4.0.1 firmware.
  7. deathphoenix

    deathphoenix New Member

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