You can resolve the restore issues using the troubleshooting steps found in this document:
1. Update to the latest version of iTunes
To see if you have the latest version of iTunes, open iTunes and check for updates.
- Windows: Choose Help > Check for Updates
- Mac: Choose iTunes > Check for Updates
If there is an update to iTunes available, install the update and try to restore again. If you do not have an active connection to the Internet, or your Internet security settings are configured to prevent iTunes from communicating with Apple, iTunes will alert you that the iTunes update server could not be contacted. Resolve your Internet issues and attempt to update again.
2. Restart your computer
Simply restarting the computer can clear up certain issues that could prevent you from restoring iPhone or iPod touch. After you restart, try restoring the device again in iTunes.
3. Open the proper ports and allow access to Apple servers
During the update and restore process, iTunes needs to contact Apple. Ensure that your computer has the following ports open and can access these servers:
phobos.apple.com, albert.apple.com, gs.apple.com
If you see "Error 9807", you must open access to the following VeriSign servers:
If you are using a Windows operating system, you can follow this article to help resolve issues caused by third-party security software.
You may need to update, properly configure, disable, or uninstall built-in firewalls and other security software to prevent interference with iTunes. For assistance with this, contact the company that supports the firewall or security software you use. If you are using proxy settings, try to restore or update without using a proxy.
4. USB Troubleshooting
Connect iPhone or iPod touch to a different USB port on your Mac or Windows PC. USB 2.0 ports that are built in to the computer are preferred over a hub. If you tried connecting iPhone or iPod touch to USB ports on the front of the computer, try connecting them to rear USB ports. After doing this, try to restore the device in iTunes.
If the issue continues:
Remove all USB devices except the keyboard, mouse, and iPhone or iPod touch. Remove all USB hubs and connect directly to the computer.
Connect iPhone or iPod touch directly to the included USB cable, bypassing the dock.
Restart the computer.
Try to restore the device again in iTunes.
If available, test with alternative, known-good USB cables.
5. Restore on a different computer
If the issue is not resolved with the above steps, try to restore using a different computer. Ensure that the computer you use has USB 2.0 ports, the latest version of iTunes, and that you connect directly to the computer.
If another computer is not available, proceed to the Advanced Steps below.