4g smartphone phablet android phone dual sim phone series samsung galaxy j samsung galaxy display size 55 inch display resolution 1280 x 720 pixels display resolution hd display type super amoled touchscreen capacitive ram 2 gb internal memory gb 16 gb max memory expansion 128 gb processor core 8 cpu clock speed 16 ghz memory cards microsd microsdhc microsdxc sensors accelerometer g sensor proximity sensor location services gps glonass a