When your iPhone is completely unresponsive, you should use a force restart. If you’re used to the old way and have attempted to use it on the iPhone 7, you’ll quickly realize it doesn’t work.
Press and hold the Sleep/Wake and Home buttons together until the Apple logo appears on the iPhone 6 and earlier, you can force to restart your iPhone.
Instead of a traditional Home button, the iPhone 7 have a Home/Touch ID sensor, which isn’t used to trigger a force restart. Don’t worry, we’re here to explain how to force restart your iPhone.
You only need to press and hold the Sleep/Wake and Volume Down buttons until the Apple logo appears, you can force to restart your iPhone 7 / 7 Plus.