Samsung Galaxy S6 Edge: How to Enable and Use Smart Stay Feature in Android 5.1.1 Lollipop

Smart stay is one of the smart features in Samsung Galaxy S6 Edge that works by utilizing the front camera to detect your face to have your phone keeps the screen backlight on while you're looking at it. Enabling this feature will save you from problem of having to turn on the screen again and again each time the screen timeout period is over when you want to use your phone for long time without