4g smartphone windows phone phablet dual sim phone display size 6 inch display resolution 2560 x 1440 pixels display resolution quad hd display type amoled touchscreen multitouch capacitive display properties scratch resistant display material gorilla glass 4 pixel density 493 ppi ram 4 gb internal memory gb 64 gb max memory expansion 200 gb processor manufacturer qualcomm processor type snapdragon 820 processor core 4 cpu clock speed 215 gh