The SG S4 GT-i9500, the successor to the Samsung Galaxy S3, features several software qualities of its very own like Smart Scroll, Smart Stay and Air Gesture. It has a 13 megapixel back camera as well as a 5 inch 1080d display, the operating system is Android 4.2.2 with TouchWiz Nature UX 2.0 graphical user interface. Certain sources has it that this mobile was the fastest selling smartphone in the history of Samsung when released.The phone weighs 130g.