How to Fix Stuck on Slide to Upgrade Screen
When Update to iOS 10/10.1/10.2/ 10.3.2

Some Apple users trying to upgrade to the fire-new iOS 10 may unexpectedly run into a serious problem: During the update to iOS 10.3.2, you find yourself stuck on the "Slide to Upgrade" screen. iPhone users normally get stuck after they download and install iOS 10 Over the Air, and it asks you the passcode again and again and seems will never out of the loop.

We also show you some quick solutions to fix iPhone Stuck on Verifying Update screen, and for those who lose the most important data on iPhone during the update, please refer to How to Retrieve Lost Data on iPhone After iOS 10 Update.

Fix Stuck on Slide to Upgrade Screen When Update to iOS 10/10.1/10.2/10.3.2

Step 1. Connect your iPhone to computer and run iTunes. Click the device button.

Step 2. If your iPhone not showing up in iTunes, you may need to force restart it: Press and hold the sleep/wake and home buttons for at least 10 second until the Apple logo being displayed onscreen.

Step 3. In Summary, select Restore Backup... and choose a recent backup file. Then click Restore. If you don't have a backup, you need to create one.

This method may not work if you have "Find my iPhone" on your iPhone enabled, so you will need to disable it before restoring your iPhone using iTunes. To turn off it: Open Settings on iPhone > iCloud > Find My iPhone > Turn it off by enter the iCloud password.

If nothing else works, you have a chance to go back to the earlier iOS firmware by downgrading. For any other problems you meet when update to iOS 10.3.2 like iMessage not working or Bluetooth issues, please refer to Top iOS 10 Updating Problems and Fixes.