12 Apr 2013, Schwerin, Germany — (ILLUSTRATION) An illustration dated 12 April 2013 shows the display of a smartphone with the app Snapchat in Schwerin, Germany. Facebook has been losing users for a while, but services such as Snapchat, Tumblr, Twitter and Vine are becoming more popular. Photo: JENS BUETTNER — Image by © Jens Büttner/dpa/Corbis