• To save battery power, your screen turns off if you haven't used it for some time. You can lengthen or shorten the time before your screen automatically turns off.

  You can also use Attentive Display to keep your screen from turning off when you're looking at it.

• When you bring the phone to your face to speak into it during calls, the screen turns off to prevent accidental touches. When you pull the phone away from your face, the screen turns on so you can use it. (If the screen stays dark, follow these steps.)

• When you use Auto lock, the screen instantly locks if your phone detects you've left a trusted place, disconnected from a trusted device, or disconnected from a trusted Wi-Fi network. Set it up so you don't have to remember to manually lock the screen when you've left more secure circumstances.

To turn the screen off:

• Press the Power button. When you set down your phone, it's good habit to do this. You prevent accidental touches, save a bit of battery, and keep it secure with the screen lock.
• Tap your home screen twice. (If this doesn't work, turn the gesture on.)
• To keep your screen off and phone quiet when you don't want interruptions, use Do Not Disturb settings.

To turn the screen on:

• Press the Power button. If you've set up a screen lock, you need to unlock it.
• Tap the screen. (If this doesn't work, turn the gesture on.)
• If you've added your fingerprint to the phone, touch the sensor to wake and unlock your phone.
• Your screen automatically turns on when you have an incoming call.