Restart your iPhone Find out how to turn your iPhone off , then back on. How to restart your iPhone X, 11, 12, 13 or later Press and hold either volume button and the side button until the power- off slider appears. Drag the slider, then wait 30 seconds for your device to turn off . If your device is frozen or unresponsive, force-restart your device. Find out how to turn on any iPhone , including iPhone 13 or iPhone 15. How to turn off your iPhone , no matter which model it is. A simple guide to shut off your iPhone with or without the hardware buttons Do you want to power down your iPhone but aren't sure which buttons to press? If you need to turn off your iPhone , you can easily do so in a few simple steps.... Turn iPhone on or off Use the side button to turn on iPhone . You can use the side button (along with either volume button on some models) or Settings to turn off iPhone . If your iPhone isn’t working as expected, you can try restarting it by turning it off , then turning it back on.