4g smartphone phablet android phone series samsung galaxy samsung galaxy s display size 51 inch display resolution 2560 x 1440 pixels display resolution quad hd display type super amoled touchscreen multitouch capacitive display characteristics always on display display properties scratch resistant display material gorilla glass 5 pixel density 577 ppi brightness 719 cdm contrast 32771 ram 4 gb internal memory gb 32 gb max memory expansio