Crystal Hard Faceplate Black With Blue Flowers Design Cover Case for HTC EVO 4G (SPRINT) [WCC93] Hard Crystal Solid Cover Case with Design. Personalize the look of your phone with this stylish and unique design. This form fitting snap-on case is designed to offer all-around external surface protection to your phone. Smart design, gives you total access to all functionality and buttons. Easy to install, just snap-on to your phone.