:-[ Apologies to the Guest. But I want to Repair this partial wrong answer..
C'mon SGs7..Do it right at once..oK here it goes: The Samsung phones
and most other Brands. Turn phones On/off from the Righ-side button
Also latest models get On/off by longPress the Right-button and Tap
Power off-Red icon. But LGs Phns turn On/off from a backButton