Android (operating system) of Android phones in use had known but unpatched security vulnerabilities due to lack of updates and support. Ron Amadeo of "Ars Technica" wrote also in August 2015 that "Android was originally designed, above all else, to be widely adopted. Google was starting from scratch with zero percent market share, so it was happy to give up control and give everyone a seat at the table in exchange for adoption. [...] Now, though, Android has around 75–80 percent of the worldwide smartphone market—making it not just the world's most popular mobile operating system but arguably the most popular operating system,
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