Are you one of the unfortunate users who have been afflicted with an unresponsive “Slide to Upgrade” screen after updating to iOS? There’s good news, as Apple has posted a new support document that outlines a fix for the issue.
Apple recommends restoring your device from an iTunes backup to resolve the problem.
1. Connect your iOS device to your computer and open iTunes.
2. Select your device. If you don’t see it listed, force restart your device by pressing and holding both the Sleep/Wake and Home button for at least 10 seconds, until you see the Apple logo.
3. If you made an iTunes backup of your device before updating to iOS 9, restore your device from that backup. If not, you need to make a backup of your device in iTunes, then restore from that backup.
Apple released iOS 9 on Wednesday. The new mobile operating system is compatible with iPhone 4s or later, iPad 2 or later and fifth-generation iPod touch or later devices.