Samsung unveiled the Galaxy S6 and Galaxy S6 Edge at Mobile World Congress in Barcelona, Spain. Galaxy S6 and Galaxy S6 Edge have a metal frame and a glass body both on the front and back. The Samsung Galaxy S6 is 6.8 mm thin and weighs 138g, while the Samsung Galaxy Edge is 7.0mm and weighs 132g. In terms of specs, the Samsung Galaxy S6 sports a 5.1 Quad HD Super AMOLOED display with 2560 X 1440 resolution which comes to a very high 577ppi pixel density.