Lock the screen when not using your phone.

  1. Press the power key. With front of phone facing you, combined lock
and power key is on right edge, lowest key from top.

Unlock the screen

  1. Press the power key, then swipe in from the left or right of the screen.

Tip: To wake up the screen, you can also press the back key. If there's a notification from an app on the lock screen, you can swipe over the notification to unlock the phone and open the app.