How to Restart iPhone 11

Step1: Hold down either the volume or side buttons until the power-off slider displays.

Step2: Wait 30 seconds after dragging the slider for your smartphone to switch off. Force restart your device if it is frozen or unresponsive.

Step3: To reactivate your device, press and hold the side button (located on the right side of your iPhone) until the Apple logo appears.

Now, your iPhone is restarted. You can restart any iPhone using this simple and easy technique. 

Swipe Up to Know Further Information: How to Restart 2nd and 3rd Generations.