Using the flashlight on your samsung galaxy s6 is not too hard to figure out. It is not the same as on other samsung devices however. So to use the flashlight on the galaxy s6 first pull down your notification bar at the top. Then in the second row you should see the flashlight icon. Simply click this icon and it will turn on the flashlight for your galaxy s6. A nice trick for making the galaxy s6 flashlight more accessible is to simply hold down on the icon, and then drag it to the top of your notification bar. This will make it easier for you to simply click when you need to turn it on.