Fix iOS 7 Downgrade Error: Restore error 3194 or 'This device isn't eligible for the requested build'

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Symptoms
When attempting to update or restore an iPhone, iPad, or iPod touch, iTunes may display "Error 3194" or the following message: "The iPad [device name] could not be restored. This device isn't eligible for the requested build."

This occurs when iTunes is unable to communicate with the update-and-restore server (gs.apple.com). This is most likely because it is being blocked, redirected, or interrupted by security software, hosts-file entries, or other third-party software.

Resolution

Perform the following steps to resolve this issue:

Install the latest version of iTunes.

Certain software applications can modify your hosts file, which can prevent your computer from accessing the update server. Follow the steps below to verify that your computer is correctly configured to contact the Apple update server.

Note: If an application has modified your hosts file, you may need to uninstall that application before editing or recreating your hosts file.

Mac

Windows

If the issue persists and you have TCP/IP filtering, firewall, or security software installed on your computer, follow the steps in this security-software troubleshooting article to correctly configure or temporarily uninstall your software. If you uninstalled software to resolve the issue, contact the manufacturer of that software for assistance with installation and configuration.

Some third-party routers may have default security or network settings that block access to the update server. If you are using a third-party router, disconnect power to the router and connect directly to the ISP source. You may have to restart your computer and ISP modem to establish an Internet connection before attempting to restore.

If the above steps did not resolve the issue, try restoring on another computer with a known-good Internet connection.

Additional Information

Find information about other update and restore errors not documented here.

If you are a developer and have a prerelease version of iTunes installed, make sure you have updated to the latest developer software and available build of iTunes.

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Ditulis oleh: mod decoration - Saturday, February 22, 2014