BRILLIANT DISPLAY Billy 4.7 features ASAHI DRAGONTRAIL GLASS, a damage resistant, more durable, & exceptionally responsive display. IPS HD Screen (1280 x 720) ULTRA SLIM DESIGN The thinnest Windows Phone in the World with its 7.2mm Ultra POWERFUL PROCESSING Fast processing with Qualcomm Snapdragon S2 1.2 GHz Quad Core Specification: Operating system WINDOWS 8.1 Processor QUALCOMM SNAPDRAGON 1.2 GHZ QUAD CORE Capacity 8GB INTERNAL MEMORY EXPANDABLE UP TO 128GB Display 4.7” IPS HD CAPACITIVE MULTI TOUCH SCREEN Connectivity BLUETOOTH 4.0 WIFI WIFI HOTSPOT GPS WITH GLONASS Rear camera 8MP AUTO FOCUS Front camera 2MP Sim Type DUAL SIM