If your iOS device disconnects during the update or restore or if iTunes couldn't tell the device to restore, you might see one of these messages:
- The iPhone [device name] could not be restored. An unknown error occurred (9).
- The iPhone [device name] could not be restored. An unknown error occurred (4005).
- The iPhone [device name] could not be restored. An unknown error occurred (4013).
- The iPhone [device name] could not be restored. An unknown error occurred (4014).
Try these steps to restore your iOS device:
- Install the latest version of iTunes.
- Restart your computer.
- Check for updates to your Mac or PC. If you restart your computer for an update, check for updates again after you restart.
- Try to restore your device using another USB cable.
- Try to restore your device on another computer.
- Force your device to restart.
If you continue to see error 4005, 4013, or 4014 when you try to restore your iPhone, iPad, or iPod touch, contact us.