How to fix iphone keeps restarting every a few minutes after update

This is the best-kept secret for fixing boot loop issues. If your iPhone keeps restarting every a few minutes, Apple Configurator is a free app from Apple designed for businesses and schools to manage multiple iDevices, but it has a powerful "Revive" feature that iTunes/Finder does not have.

Why this is better than iTunes/Finder:

   The "Revive" function attempts to fix the iOS system without erasing your data

   It can recover devices that iTunes/Finder won't even recognize

   It's completely free and official from Apple

What you do if iPhone keeps restarting every a few minutes:

1. Download Apple Configurator from the Mac App Store (Mac only—this does not work on Windows)

2. Install and open the app

3. Connect your iPhone to your Mac via USB

4. If your device appears, select it

5. Click Actions → Advanced → Revive Device

6. Follow the on-screen prompts