While trying to upgrade my iPhone software I have encountered the error message: The iPhone "-" could not be restored. An unknown error occurred (29).

Please help me

Did you try this:
Check for hardware issues
Try to restore your iOS device two more times while connected with a cable, computer, and network you know are good. Also, confirm your security software and settings are allowing communication between your device and update servers. If you still see the alert when you update or restore, contact Apple support.
Common errors: 1, 10-47, 1002, 1011, 1012, 1014, 1000-1020.
copied from Resolve specific iTunes update and restore errors

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  • TS3694 hello out there ! am trying to restore my ios, but toward the end of the process, i am receiving an error message like "the iphone could not be restored, an unknown error occured(1015). Kindly help me resolve this problem, my iphone has been down f

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    mazunzo tembo wrote:
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  • "the iphone could not be restored an unknown error occurred (2)"

    Yesterday I connected my iPhone 4 to my Windows 7 laptop, and went through to install the latest security update for iPhone through iTunes. When it was installing the software update, the phone froaze, and then this happened:"the iphone could not be restored an unknown error occurred (2)"
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  • HT201210 the iphone could not be restored. an unknown error occurred (1015).

    the iphone could not be restored. an unknown error occurred (1015).

    Error 1015: This error is typically caused by attempts to downgrade the iPhone, iPad, or iPod touch's software. This can occur when you attempt to restore using an older .ipsw file. Downgrading to a previous version is not supported. To resolve this issue, attempt to restore with the latest iPhone, iPad, or iPod touch software available from Apple. This error can also occur when an unauthorized modification of the iOS has occurred and you are now trying to restore to an authorized, default state.
    http://support.apple.com/kb/TS3694#error1015.

  • After i updated my iphone 4s from 8.1.2 to 8.1.3 problem occurred.i cant restore and update my phone?saying that iphone could not be restored,an unknown error ocuurred.please help me?

    After i updated my iphone 4s from 8.1.2 to 8.1.3 problem occurred.i cant restore and update my phone?saying that iphone could not be restored,an unknown error ocuurred.please help me?

    Thanks for the update and clarification. In researching the issue it seems that the 2003 error code may have something to do with the USB connection. I would use this section of one of the above articles:
    Get help with iOS update and restore errors
    If the USB connection between your device and computer is interrupted, you might not be able to update or restore.
    To narrow down the issue, you can try different equipment:
    Use the USB cable that came with your device, or a different Apple USB cable. 
    Plug your cable into a different USB port directly on your computer. Don't plug it into your keyboard.
    Try a different computer.
    Solve other issues with the USB connection, then with your security software.
    If you still see the error message, check for hardware issues by following the next section.
    Check for hardware issues
    Related errors: 1, 3, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 1002, 1004, 1011, 1012, 1014, 1667, or 1669.
    These errors mean that your device or computer might have a hardware issue that stops the update or restore from completing.
    Check that your security software and settings aren't blocking your device from communicating with the Apple update server.
    Then try to restore your iOS device two more times while connected with a cable, computer, and network you know are good.
    Make sure that your security software and settings are allowing communication between your device and update servers.
    If you still see the error message when you update or restore, contact Apple support.

  • The iphone could not be restored an unknown error occurred (21)

    Hi,
    Suddenly my iphone got switched off, so i tried to restore it - but now im getting the iphone could not be restored an unknown error occurred (21)
    i think once i got OS update this issue is occuring
    kindly give a solution for this issue
    Thanks in Advance
    Regards
    Babou gv

    Read
    Error 20, 21, 23, 26, 28, 29, 34, 36, 37, 40
    These errors typically occur when security software interferes with the restore and update process. FollowTroubleshooting security software issues to resolve this issue. In rare cases, these errors may be a hardware issue. If the errors persist on another computer, the device may need service.
    Also, check your hosts file to verify that it's not blocking iTunes from communicating with the update server. See iTunes: Advanced iTunes Store troubleshooting—follow steps under the heading Blocked by configuration (Mac OS X / Windows) > Rebuild network information > Mac OS X > The hosts file may also be blocking the iTunes Store. If you have software used to perform unauthorized modifications to the iOS device, uninstall this software prior to editing the hosts file to prevent that software from automatically modifying the hosts file again on restart.

  • Im getting a prompt like..the iphone "iphone" could not be restored, an unknown error occured (21)

    I am getting a prompt after the Restoration cycle like " the iphone could not be restored. an unknown error occured (21) and (1611)

    iPad: Basic troubleshooting
    http://support.apple.com/kb/TS3274
    Update and restore alert messages on iPhone, iPad, and iPod touch
    http://www.buybuyla.com/tech/view/012953a0d412000e.shtml
    iOS: Resolving update and restore alert messages
    http://support.apple.com/kb/TS1275
    iPad: Unable to update or restore
    http://support.apple.com/kb/ht4097
    iTunes: Specific update-and-restore error messages and advanced troubleshooting
    http://support.apple.com/kb/TS3694
    If you can’t update or restore your iOS device
    http://support.apple.com/kb/ht1808
     Cheers, Tom
    Check for hardware issues
    Related errors: 1, 3, 10, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 1000, 1002, 1004, 1011, 1012, 1014, 1667, or 1669.
    Try to restore your iOS device two more times while connected with a cable, computer, and network you know are good. Also, confirm your security software and settings are allowing communication between your device and update servers. If you still see the error message when you update or restore, contact Apple support.
    Message was edited by: Texas Mac Man

  • TS3694 Has anybody had this error message: "the iphone could not be restored. an unknown error occurred (1015) ???

    the iphone could not be restored an unknown error occurred 1015

    Error 1015: This error is typically caused by attempts to downgrade the iPhone, iPad, or iPod touch's software. This can occur when you attempt to restore using an older .ipsw file. Downgrading to a previous version is not supported. To resolve this issue, attempt to restore with the latest iPhone, iPad, or iPod touch software available from Apple. This error can also occur when an unauthorized modification of the iOS has occurred and you are now trying to restore to an authorized, default state.

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