The full face tempered glass of Volte-Tel is a hardened glass that covers the entire screen, specially made to protect the screen of your mobile phone from scratches and other damages. In case of a drop, it does not guarantee that the screen will not break along with it, however, it provides an additional protection. It does not affect the functionality of the screen. It has adhesive on its entire surface, unlike edge glue protectors that only have adhesive on their perimeter. This helps in better application and smooth operation of the touch screen. It also prevents dust from passing underneath, which can happen with edge glue when the perimeter adhesive wears off. It is 2.5D, which means that its perimeter has rounded edges for a smoother touch experience when using the screen. Useful for modern smartphones with curved screens. It is compatible with Galaxy S9+.