How to restart Apple iPhone 12 / iPhone 12 Pro Max
- For restarting your iPhone 12 or iPhone12 Pro Max you will need to press and hold the volume button and the side button so the power off slider appears.
- Then drag the slider and wait a few seconds for your device to switch off.
- To turn on your iPhone again, press and hold the side button on the right side of your iPhone until you see the Apple logo.
Source: apple.com