Windows phone phablet dual sim phone series microsoft lumia display size 57 inch display resolution 1280 x 720 pixels display resolution hd display type ips touchscreen multitouch capacitive display characteristics clearblack display properties scratch resistant display material gorilla glass 3 pixel density 259 ppi ram 1 gb internal memory gb 8 gb max memory expansion 128 gb processor manufacturer qualcomm processor type snapdragon 400 proc