the GALAXY S4: A Life Companion for a Richer, Simpler and Fuller Life.
it is a successor to the Galaxy S III which maintains a similar design, but with upgraded hardware and an increased focus on software features that take advantage of its hardware capabilities -such as the ability to detect when a finger is hovered over the screen, and expanded eye tracking functionality (which includes scrolling). A hardware variant of the S4 also became the first smartphone to support the emerging LTE Advanced mobile network standard.