Windows phone phablet 4g smartphone series microsoft lumia display size 5 inch display resolution 1280 x 720 pixels display resolution hd display type amoled oled touchscreen multitouch capacitive display characteristics clearblack truecolor glance screen display properties scratch resistant display material gorilla glass 3 pixel density 297 ppi brightness 385 cdm ram 1 gb internal memory gb 16 gb max memory expansion 200 gb processor manuf