To power off your Apple iPhone X, 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. It is that simple, and new iPhone users will be happy to find out.
Steps To Turn Off iPhone X
If your iPhone X is unresponsive and you need to turn it off, press the Volume Up for 1 second, followed by Volume Down for 1 second, then press and hold the Side Button until the phone turns off.
The above tips for turning off iPhone X also works for iPhone 11 and iPhone 12 series devices.
How To Turn Off iPhone 8 and older iPhones
If you own an older iPhone model, e.g. iPhone 8, 7, 6, etc, turning them off is straightforward. Hold the side/power button, and the power off slider screen should appear. Then, swipe the slider to the right to turn off the device.