Samsung Galaxy S6 and Samsung Galaxy S6 Edge are Android smartphones manufactured and marketed by Samsung Electronics. The S6 and S6 Edge jointly serve as successors to the Galaxy S5. The smartphones were officially unveiled in a press conference at Mobile World Congress on 1 March 2015. Alongside the S6, Samsung also unveiled the S6 Edge, a variant whose screen is wrapped along the sides of the device; the curvature is usable for several additional features. The Galaxy S6 was released on 10 April 2015 in 20 countries. Although the overall design of the Galaxy S6 still features some similarities to prior models, the construction of the device itself was revamped, with a metal unibody frame and glass backing instead of plastic. The devices also introduced an improved camera, a streamlined user interface, support for both major wireless charging standards, and support for a mobile payments platform that allows the device to emulate the magnetic strip from a credit card. The S6 features other hardware improvements as well, including a 1440p display, a new in-house system-on-chip that utilizes a 14 nm FinFET manufacturing process, and an improved fingerprint scanner.