Turn Your iPhone Off (and On Again)
Believe it or not, most people don’t know how to turn off their iPhones. To be fair, that’s because Apple made it just a bit more complicated than on other devices.
For instance, instead of just pressing the side button and waiting for a confirmation to turn your iPhone off (which is how this was done on older iPhone models), you now also need to press and hold the volume-up button.
Press both buttons for a few seconds, and then you’ll get the option to turn off your iPhone.
Fortunately, turning your iPhone back on is even easier; you only need to press and hold the side button until the Apple logo appears on your screen.