Tempered glass is a hardened glass, specially designed to cover and protect your mobile phone screen from scratches and other damages. It does not affect the screen's functionality. In case the phone is dropped, it does not guarantee that the screen will not break as well, but it provides additional protection. It is 3D, meaning it has undergone special processing to have curved edges that cover the entire surface of the mobile phone screen. This way, it is not noticeable that the screen has protection, and the curved edges are also protected. It is compatible with the Galaxy A72.