Samsung Galaxy S6 Edge: How to Turn Off All Sounds in Android 5.1.1 Lollipop

For some reason, you might don't want your Samsung Galaxy S6 Edge makes any sound, for the example, when you're in the library or in the meeting room. Fortunately, you can make your phone to be truly silent without you have to change any volume settings in your phone. You can do so simply by single tapping an option named turn off all sounds, and all sounds in your phone will be turned off