Q: Ios9 update completed but slide frozen

Howdy lulubot,

Thanks for using the Apple Support Communities.

I see from your post that the Slide to Upgrade screen on your iPhone isn't responding.  I know this must be a very frustrating issue, but there is good news!  If you follow the information below you should get your iPhone back in working order.

Use these steps:

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.

If the Slide to Upgrade screen won't go away after you update to iOS 9 - Apple Support

Take care.