A really very practical gesture at the Samsung Galaxy S5 is the silent mode by turning the device when you receive a call. Unfortunately, the "Turn Over" function to mute the Samsung Galaxy S5 is not activated at the factory. So at first you have to enable this function in the settings if you want to use it.
This works as follows:
Open the menu on your Samsung Galaxy S5 and then tap on:
Settings -> Motions and gestures --> Mute/ pause
You will now find a checkbox with "Turning the device over". Set a mark in the checkbox to activate the function. In addition, ensure that the slider in this sub-menu in the top right corner is switched to "active". When this option is enabled you can mute the ringtone from an incoming call, at the Samsung Galaxy S5, by turning the device over.