With a case-friendly screen protector on your screen, using a case isn't a problem. That's because a case-friendly screen protector doesn't come all the way up to the edges of your screen. As a result, your phone case won't push the screen protector off the screen. There are flat and curved case-friendly screen protectors. The curved screen protectors are suitable for devices with rounded edges. The edges of the screen protector slope and seamlessly merge into the rounded edges of your device. That way, you know for sure your screen is properly protected. Most screen protectors are case-friendly, but it's always good to check if they are. Especially if you have a large and thick case. Select your device, so you buy the right screen protector.