Android phone 4g smartphone dual sim phone series samsung galaxy samsung galaxy a display size 47 inch display resolution 1280 x 720 pixels display resolution hd display type super amoled touchscreen multitouch capacitive display properties scratch resistant brightness 664 cdm ram 15 gb internal memory gb 16 gb usable internal memory 11 gb max memory expansion 128 gb processor manufacturer samsung processor type exynos 7578 processor core