To restart an iPhone, you can follow these steps:
- Press and hold the Power button (also known as the Sleep/Wake button) located on the right side of the iPhone (iPhone X and newer) or the top of the iPhone (iPhone SE, 6s, and earlier) until the “slide to power off” option appears on the screen.
- Slide the power off option to the right to turn off the iPhone.
- Wait for a few seconds, and then press and hold the Power button again until the Apple logo appears on the screen.
- Release the Power button and wait for the iPhone to restart.
After the iPhone has restarted, you can unlock it and use it as usual.