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,
Nokia When the Lumia 920 was announced in September 2012, it was seen by the press as the first high-end Windows Phone that could challenge rivals due to its advanced feature set. Elop said that the positive reaction to it had created a sense of hope and optimism in the company. The company was also making gains in developing countries with its Asha series, which were selling strongly. Although Nokia's smartphone sales and market share greatly increased throughout 2013, including in the North American market, it was still not enough to avoid financial losses. Ollila stepped down as chairman on 4