With a OnePlus 13R case, you protect your smartphone from scratches and dents with a case. With a back cover, you protect the side and back of your device. Want to protect the front of your smartphone as well and always have your cards with you? Choose a book case. You can store cards or cash in the front flap. Often drop your device or want to protect your device even better from drops? Choose a back cover with fall protection. This back cover prevents fall damage up to a certain height.