Learn how to use screen lock on your Sony Xperia Z. When your device is on and left idle for a set period of time, the screen darkens to save battery power, and locks automatically. This lock prevents unwanted actions on the touchscreen when you are not using it. On the lockscreen, you can still take photos and play audio tracks.
To activate the screen
Briefly press the power key.
To unlock the screen
Drag up or drag down.
To lock the screen manually
When the screen is active, briefly press the power key.
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