The Samsung Galaxy S3 is a beautiful smartphone with a 4.8-inch Super AMOLED display and a 1280 x 720 resolution of 306 pixels per inch, or ppi; its successor, the Samsung Galaxy S4, is said to feature a slightly larger 4.99-inch Full HD SoLux Display with a reported resolution of 1080 x 1920 pixels, which comes out to be an extremely dense-looking display at 450+ ppi.