My phone is just a piece of garbage, but here's the photo. It also says "XR_7" and the date/time in cyan lettering.
My tablet has a zoomed in photo of the rims on a Corvette Stingray. Apps on the front are Chrome, Gmail, Camera, Play Store, YouTube, Facebook, SportsCenter, Pandora, Steam, Settings, Tablet (folder), Radar Express, Clean Master, Games (folder), Jobs+, Notepad, Stopwatch & Timer, and Calculators (folder).