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I have just upgraded to iOS 9 and it says slide to upgrade and when I try to slide it doesn’t respond. Please help!
Connect your iPhone to a computer that you have previously synced with iTunes, make sure iTunes is open.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.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. (P.S: These steps are from Apple inc.)
