Samsung Galaxy S7 Edge are Android smartphones manufactured and marketed by Samsung Electronics. The S7 series is a successor to the 2015 Galaxy S6, S6 Edge and S6 Edge+, and was officially unveiled on 21 February 2016 during a Samsung press conference at Mobile World Congress, with a European and North American release scheduled for 11 March 2016.[4][5] As with the S6, the S7 is produced in a standard model with a display size of 5.1 inches, as well as an Edge variant whose 5.5-inch display is curved along the wide sides of the screen. The Galaxy S7 is an evolution of the prior year's model, restoring features from the Galaxy S5 such as IP certification for water and dust resistance, as well as expandable storage.