The "Slide to Upgrade" issue with iOS 9 is real and Apple has taken to its support pages to detail how to resolve it.
Apple's latest iOS 9 rolled out to the public earlier this week, but many users faced several issues with the latest software. In fact, many got stuck at the beginning, not even able to complete the update process due to some bugs in iOS 9. While some saw error messages such as "Software Update Failed" or the update process got stuck at "Update Requested," others hit a wall with the "Slide to Upgrade" screen after updating to iOS 9.
Users flocked to Apple's forums complaining that their device prompts them to Slide to Upgrade, but it will not allow it.
Apple has now responded and created a new page on its Product Support website for this matter, detailing a few simple steps to help users overcome this issue. The process is not complicated, but it does require users to connect to a computer with iTunes.
How To Solve iOS 9 'Slide To Upgrade' Issue
First, users will have to connect their iOS device to a Mac or PC running iTunes using a USB cable. A device list will appear in the top left corner of iTunes, with each device having its respective icon. Select your connected device from this list.
If the iOS device you connected to the computer does not appear on this list, perform a force restart. To do so, press and hold the sleep/wake and home buttons simultaneously for at least 10 seconds. The force restart is successful when the Apple logo appears on the screen.
From here, the next step is to restore the backup. If you previously made an iTunes backup before you attempted to upgrade your device to iOS 9, you can use that backup to restore your device. Otherwise, click the Back Up Now button to make a backup of your device in iTunes and restore from that backup. A separate page on Apple's support website explains how to create a backup in iTunes.
This should do the trick, but it may not work for all iOS users. Apple is expected to roll out a permanent fix in a future iOS update, but for now it doesn't offer any alternative solution.
