If your iPhone isn't responding and you're not able to power it off and then on again, you can force restart it to hopefully fix the issue. So, here's how to force a restart on any iPhone ...
No biggie — you probably just have auto-brightness on ... the first two things you can do is restart your iPhone and update it to the latest software. These fixes typically make many glitches ...
Restart your iPhone and re-enable the Message ... This guarantees that your iPhone will automatically update, and you don’t need to check for it. To enable it, simply go to Settings, tap on ...