iOS 5.1 Upgrade - Unknown Error (11)

Discussion in 'iPhone Tips, Help and Troubleshooting' started by ParryD, Mar 15, 2012.

  1. macrumors member

    May 16, 2010

    I have a 3GS Factory Unlocked running on iOS 4.1.

    I went for 5.1 update [Shift+Update] for the device but it stopped with the following error message:

    On clicking more information tab in the error message was directed to the following page:

    iOS: Resolving update and restore alert messages

    The device remains in DFU Mode and get the following message on connecting to iTunes;

    Got the device out of DFU Mode using tinyumbrella, again got the same message on updating.

    I had updated my iTunes to 10.6 prior to connecting the device.

    Pls assist resolving this error message.
  2. thread starter macrumors member

    May 16, 2010
    Disabled antivirus, used another USB port & tried doing a restore [shift+restore] but still no luck; got the same error message.

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