Samsung Galaxy A3 - Lock screen with power key

Android 4.4 (Kit Kat)
Phone: Samsung Galaxy A3
Factory OS: Android 4.4 (Kit Kat)

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Lock screen with power key

An almost essential setting is the ability to lock your screen by pressing the power key once. It will save plenty of time in the long run.

If this isn’t enabled, then go to Settings – My Device – Lock Screen. Then select Lock instantly with power key.

 
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