This modern design offers 2 card slots in a pocket on the outside for quick and easy access, and an additional 3 slots inside, as well as a cash pocket. It can be folded, allowing the phone to stand on its own. Furthermore, the small magnetic lock does not wrap around on the back and is easily flipped open with your thumb (or finger of choice), giving this a less bulky look, while not compromising a good seal to keep the case closed when not used. It's molded to perfectly fit your Nokia C21. Additionally, it has a receiver cutout, allowing you to talk even if the case is closed.