Android (operating system) top-selling platform in April 2011, overtaking BlackBerry OS with a 31.2% smartphone share, according to "comScore". By the third quarter of 2011, Gartner estimated that more than half (52.5%) of the smartphone sales belonged to Android. By the third quarter of 2012 Android had a 75% share of the global smartphone market according to the research firm IDC. In July 2011, Google said that 550,000 Android devices were being activated every day, up from 400,000 per day in May, and more than 100 million devices had been activated<ref name="i/o 2011 stats"></ref> with 4.4% growth per week. In September 2012, 500
Windows Phone 8 WP8, Kantar reported in October 2013 that Windows Phone grew its market share substantially to 4.8% in the United States and 10.2% in Europe. Similar statistics from Gartner for Q3 2013 indicated that Windows Phone's global market share increased 123% from the same period in 2012 to 3.6%. In Q1 2014 IDC reported that global market share of Windows Phone has dropped to 2.7%. Windows Phone 8 Windows Phone 8 is the second generation of the Windows Phone mobile operating system from Microsoft. It was released on October 29, 2012, and like its predecessor, it features a flat user interface