The Galaxy S9 and S9 Plus are both covered in premium Gorilla Glass 5. GG5 is designed to better protect your phone from cracking during impacts and can even protect your device when landing on rough surfaces. Scratch resistance is compromised on the Galaxy S9 due Samsung’s curvature treatment. You will wan’t to be sure to use a glass screen protector. It can be hard to find a good screen protector for a device with a curved edge display. The Olixar Glass protector is one of the best.