Drop any phone, with any screen protector, so that the screen hits something solid and sharp (like tough concrete) and the screen will shatter or break, depending on the outer layer (Gorilla Glass 5, tempered glass, etc.) Until they come out with transparent steel, there's no way to protect a screen from a direct hit. These cases are all designed to keep the screen from hitting a flat surface - if they hit exactly flat. Hit at an angle, or have a tiny pebble under the screen and something will break. Remember, the case flexes a mm or two, depending on the case, so don't expect protection from anything more than 1mm above the floor, street or wherever it's dropped. (I'd rather see a chain that attaches to the case firmly, and that lets the phone reach your ear, but stops it short of hitting the ground.,)