Lock screen with power button

[AC Question]

On the galaxy s3 and early s4 the power button could lock the screen instantly no swipe or password. No pocket dialing or any nonsense since when you got a message the power button was the only thing that could unlock the screen. There is no option for this on the s5, any ways to get it?

 

[Javier P]

Go to Settings - My Device - Lock Screen and make sure that "Lock instantly with power key" is checked.