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How to turn off Android screen without using the power button [Tip]

Have you ever heard of LG’s “Knock Code”? It’s a feature that allows a user to conveniently lock his or her smartphone by simply double-tapping on its screen. Speaking of which, did you know that you can also get a similar feature on your non-rooted Android device? If you want to learn how, just read on.

How to turn off your Android screen without using the power button

Knock Lock for Android [2]

Knock Lock for Android b [3]

Knock Lock for Android c [4]

Knock Lock for Android d [5]

Just keep in mind that the position of the lock area won’t change even if you switch your device orientation from portrait to landscape mode (or vice versa).