Smartphones seem to be capable of just about everything—other than having any sort of personality. Valentine premium leather phone backs bring individuality and texture to the beautiful, yet otherwise sterile iPhone 4. Made entirely of the highest grade, genuine cow, calf and lamb leather, they\’re available in a wide range of colors and finishes, all roughly one millimeter thick (allowing them to work with bumpers and other cases). The removable leather covers apply with a thin layer of adhesive that apparently leaves no residue if you decide to quit it. Protect your phone (well, from scratches) or just use it for a more stealth look.