To restart your iPhone, follow these steps:
1. Press and hold the power button (located on the right side or top of the device) and either of the volume buttons simultaneously.
2. Keep holding the buttons until the “slide to power off” slider appears on the screen.
3. Swipe the power off slider from left to right to turn off your iPhone.
4. Once the screen goes completely dark and the device is off, press and hold the power button again until the Apple logo appears.
5. Release the power button and wait for your iPhone to restart. It may take a few moments for the device to boot up.
Your iPhone should now be restarted and ready for use. Restarting your iPhone can help resolve minor software glitches and improve overall performance.