Any cell phone with glass on the back is going to be slick, but manufactures have also decided to make colored-mirror-digitizers that allow you to customize your phone in the color of your choice. The windows, windshield, and mirrors on your vehicle are essential for a clear view of the road. Touted as stronger than earlier designs, the i - Phone 4 even now suffers from the weakness of any glass object and that is shattering, scratching, and cracking, potentially from a very small bit of skip use (you know who you are).