How to reboot iPhone 7

If your iPhone 7 stops responding, you can’t turn it off by holding down the power button. The iPhone 7 doesn’t have a physical Home button, so the method for forcing a restart, or a hard reset, has changed.

1. Press and hold down the On/Off button on the right side
2. While continuing to hold the On/Off button, press and hold the volume down button on the left side of your iPhone.
3. Hold both buttons as the screen turns off, and keep holding them until the screen turns back on and displays the Apple logo.