iOS10 intermittent black screen issue
My recommendation is to do a restore to factory settings and then dont restore the backup and see if the issue persists. I read the comments and saw that you had the device replaced and that the issue persisted once you restored the backup. Apparently there is some app data that is corrupt in your backup that is causing the issue. I urge to just set up the iPhone as new, and then dont restore the backup. If you need those apps back, all you have to do is login to both iCloud and iTunes &amp; App Stores in settings (iOS 11 click on your name above). Next go into the App Store app and then look for updates, and then click on your profile icon (iOS 11) and then look for purchased apps (or purchased). In both lists are your recently purchased/downloaded apps. If you used another account then those apps may be on that other account.