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iPhone cannot be Update

888 Views 3 Replies Latest reply: Apr 28, 2012 10:51 AM by modular747 RSS
yok hee Calculating status...
Currently Being Moderated
Apr 28, 2012 10:27 AM

My iPhone 4 cannot be update or restore always show a error code

iPhone 4, iOS 4.2
  • modular747 Level 6 Level 6 (15,740 points)
    Currently Being Moderated
    Apr 28, 2012 10:31 AM (in response to yok hee)

    What error code?  Can't give specific help without that info. 

     

    Be sure to disable all security software (firewall, antivvirus, etc.) running on your computer when updating.

    Make sure you have the latest iTunes (10.6.1).

  • modular747 Level 6 Level 6 (15,740 points)
    Currently Being Moderated
    Apr 28, 2012 10:51 AM (in response to yok hee)

    Error 3194 usually means you tried (or succeeded) to downgrade the iOS.  In doing so, you used hacking software such as tinyumbrella which modified the hosts file on your computer, blocking access to apple servers (gs.apple.com).  You have to edit the hosts file, removing all references to apple servers. 

     

    If you succeeded in downgrading, you may have altered the modem baseband. In that case, SOL - you can never update to a stock iOS again.  See this:

     

    "This device is not eligible for the requested build: Also sometimes displayed as an "error 3194." If you receive this alert, update to the latest version of iTunes. Third-party security software or router security settings can also cause this issue. To resolve this, follow Troubleshooting security software issues.

    Downgrading to a previous version of iOS is not supported. If you have installed software to performunauthorized modifications to your iOS device, that software may have redirected connections to the update server (gs.apple.com) within the Hosts file. First you must uninstall the unauthorized modification software from the computer, then edit out the "gs.apple.com" redirect from the hosts file, and then restart the computer for the host file changes to take affect.  For steps to edit the Hosts file and allow iTunes to communicate with the update server, see iTunes: Troubleshooting iTunes Store on your computer, iPhone, iPad, or iPod—follow steps under the heading Blocked by configuration (Mac OS X / Windows) > Rebuild network information > The hosts file may also be blocking the iTunes Store. If you do not uninstall the unauthorized modification software prior to editing the hosts file, that software may automatically modify the hosts file again on restart. Also, using an older or modified .ipsw file can cause this issue. Try moving the current .ipsw file, or try restoring in a new user to ensure that iTunes downloads a new .ipsw."

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