Most technical issues can be fixed by turning the device off and on again. If you encounter a strange glitch with your iPhone – maybe the sound doesn’t work, apps keep crashing or you can’t make calls – the first thing you should do is perform a fast reset. This will update your iPhone’s software and likely fix the problem.
And if your iPhone is so broken that you can’t even restart it, a hard reset works too. This method “forces” your iPhone to shut down even if it is frozen. For restart any iPhone
Steps to Restart All iPhones
Final Words
That’s it with our article on how to restart each iPhone. Clear all traces of your identity and personal data before discarding an outdated iPhone. You can delete personal data, apps and content from Apple and Android devices to prevent a new owner from accessing your device.