To power off an iPhone 11, press and hold the side button and either the volume up or volume down button simultaneously until the "slide to power off" slider appears. Then, slide the slider to the right to turn off the phone. Alternatively, you can go to Settings > General > Shut Down and drag the slider to power off the device. Siri can also power off the iPhone if enabled by saying, "Hey Siri, power off."
Step-by-step methods:
- Press and hold the Side button and Volume Up (or Volume Down) button together until the power off slider shows up; then slide to power off.
- Open Settings, tap General, scroll down to Shut Down, and drag the slider to turn off.
- Use Siri by saying "Hey Siri, power off," to turn it off hands-free.
To turn the iPhone back on, press and hold the Side button until the Apple logo appears.
