SOUND IS VERY SWEET AN CLEAR. 720P AND 1080P VIDEO ARE FREQUENTLY AND EASY PLAY WITHOUT STOP AND PLY SMOOTHLY CAMERA QUALITY IS FINE A TAKE PHOTO AND ANY MOMENT OF SNAP SHOOT. NIGHT PHOTO SHOOT NOT A CLEAR.WI-FI HOTSPOT ARE EASY TO CONNECT OTHER DEVICES.IT IS NEW GENERATION MOBILE PHONE FOR A ESSENTIAL NEW YOUTH.THAT PHONE SPEED IS FAST.THIS MOBILE IS PLAY GAMING AND USE OTHER APP. THIS MOBILE ARE QUAD CORE PROCESSOR TO PLAY GAMING AND VIDIO AND MOBILE APP. ALL SAMSUNG MOBILE DESIGN ARE SAME.