Crystal Hard WHITE Cover With BUTTERFLIES Design Case for RIM BlackBerry Curve 8520 T-Mobile + Swivel Belt Clip [WCM404] Hard case with BUTTERFLIES 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. Included a removable swivel Belt Clip.