iPhone 4 GSM Only The SportShell Convertible for iPhone 4 GSM Only delivers 4-cases-in-1, and offers you the only iPhone case you'll ever need. This versatile, elegant, and cross-functional design offers: a hard shell case, an armband case, a belt case, and a tabletop viewing case all at a single price, in a single product. By utilizing a patent-pending system with a quick-release/quick-attach armband design, we're able to offer a solution for any carrying style you prefer pocket, belt, purse, or armband. It all starts with a rigid, polycarbonate shell that offers scratch and impact protection. Also included is a comfortable, reflective armband that keeps your iPhone safely away from perspiration and provides an easy quick-release solution for when you want to detach your iPhone from the armband in a hurry. The secure, rotating clip on the back of the case attaches quickly and easily to the included armband, or to a belt, purse, bag, or strap. This same clip also locks into viewing position so your iPhone can stand horizontally or vertically for viewing on a flat surface. All of this without major sacrifices to form factor, functionality, or aesthetics. You no longer need to purchase multiple cases for your iPhone the SportShell Convertible offers a total solution at a reasonable price.