When your device is on and left idle for a set period of time, the screen darkens to save
battery power, and locks automatically. The screen lock prevents unwanted actions on
the touchscreen when you are not using it.
To activate the screen
Briefly press the power key .
To unlock the screen
Place a finger on the screen and swipe up or down.
There are several ways to unlock the screen. For more information, see Setting a screen lock
on page 114.
To lock the screen manually
When the screen is active, briefly press the power key .