To turn off your iPhone, follow these steps:
For iPhones with Face ID (iPhone X and later):
- Press and hold the Side button and either Volume button until the sliders appear.
- Slide the Power Off slider to the right to turn off your iPhone.
For iPhones with a Home Button (iPhone 8 and earlier):
- Press and hold the Side (or Top) button until the slider appears.
- Slide the Power Off slider to the right to turn off your iPhone.
Alternative Method:
- Go to Settings > General.
- Scroll down and tap on Shut Down.
- Slide the Power Off slider to turn off your iPhone.
After your iPhone powers down, you can turn it back on by pressing and holding the Side button until you see the Apple logo.