how to downgrade 3.0 to 2.2.1

Discussion in 'iPhone' started by pluspeed66, Jun 17, 2009.

  1. pluspeed66

    pluspeed66 New Member

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    how to downgrade official 3.0 to 2.2.1
  2. ChronicFunk

    ChronicFunk New Member

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    Google is your friend.
  3. michaelsipod

    michaelsipod New Member

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    i need to know this also, i keep getting all these dfu mode errors
  4. pluspeed66

    pluspeed66 New Member

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    i finally got it.. just downgrade your itunes to 8.1.1 then put it into dfu mode shift+restore choose the 2.2.1 firmware then thats it open quickpwn and your all set
  5. iphonix

    iphonix New Member

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    Do you mean 2.2.1? Or do you mean 2.1?

    2.2.1 DOES NOT work for me when I do this. I am getting a firmware incompatibility error.

    I think we're in for many Apple tricks with the 3.x software. They have thrown in many gotchas already the DevTeam is discovering... Cat and Mouse.
  6. pluspeed66

    pluspeed66 New Member

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    Yeah downgrade your itunes into 8.1.1 from there you can turn your phone into dfu mode then shift restor the 2.2.1 firmware
  7. MozBlue

    MozBlue New Member

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    Man! thi is hard.
  8. studangerous

    studangerous Super Moderator Emeritus Staff Member

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    Having problems downgrading a friends iPhone 3G from 3.0 to 2.2.1 - can someone who has definitively downgraded please give a full description of their set-up?
  9. ploderup

    ploderup New Member

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    use this, it worked for me

    http://www.ifans.com/forums/showthread.php?t=197220

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