Samsung Galaxy S4 - April For most of 2013, the Samsung Galaxy S4 has reigned supreme as Samsung's flagship smartphone. The device, which arrived back in April of this year, has taken on the likes of the iPhone 5, iPhone 5s, HTC One, and even in-house competitors like the Samsung Galaxy Note 2 and Samsung Galaxy Note 3. The Indian version of the Galaxy S4 comes loaded with 1.6 GHz octa core Exynos 5 processor. The 5-inch display screen of this smartphone offers visuals at full HD (1920 x 1080 pixels) resolution, with 441 ppi pixel density. The display screen of the Samsung Galaxy S4 is protected by Corning Gorilla Glass 3. The Samsung Galaxy S4 has a 13 MP primary camera with supporting features like auto focus, LED flash, face detection, smile detection and image stabilization etc. It also has a 2 MP secondary camera loaded in it. The device comes with 16 GB, 32 GB or 64 GB internal memory variants, which can be expanded up to 64 GB through a microSD card. The Samsung Galaxy S4 comes with Android 4.2.2 Jelly Bean OS loaded in it.