The full face tempered glass by Hofi is a full-coverage hardened glass, specially designed to protect your phone screen from scratches and other damages. In case of a phone drop, it does not guarantee that the screen won't break along with it, but it provides an additional layer of protection. It does not affect the screen's functionality. The black border covers the entire surface of the screen, including the edges. Its special treatment makes the phone screen visible only from the front, blocking the view from any angle. This protection is useful if you frequently use public transportation and do not want those around you to look at your screen.