Windows Phone is a newcomer in the mobile market. Microsoft is playing aggressively, selling large numbers of low-cost devices through many wireless carriers. The operating system is optimized to run perfectly even on low-end hardware and it offers a much smoother user experience on cheap phones, compared to the bulkier and heavier Android.
According to IDC (http://www.idc.com/prodserv/smartphone-os-market-share.jsp), Windows Phone accounts for some 2.6% market share (Q2 2015). 8.8 million units were sold in Q2 of 2015.
Unlike BlackBerry, whose market share has been dropping year over year, Microsoft manages to grow its user base by selling millions of inexpensive devices in emerging markets, such as India. Windows Phone is a strong third after Google Android and Apple iOS, while BlackBerry barely makes it into the Others chart.
According to Kantar (http://www.kantarworldpanel.com/smartphone-os-market-share/intro), in...