Global smartphone sales volume will grow +7% in 2017, improving from +2% in 2016. Android will maintain the largest smartphone platform by volume, followed by iOS. Tizen's momentum has been softened since 2016 but is likely to rebound in 2018. A new operating system that potentially to emerge in 2019 will steadily chip away at Android's and iOS's lead during the next five years. Our extensive report forecasts global smartphone sales, by 14 operating systems, for 88 countries worldwide, from 2007 to 2022. Almost every major country worldwide is covered, including United States, China, India, Indonesia, Japan, South Korea, Russia, Brazil, Mexico, South Africa, Saudi Arabia, UK, Germany, France, Italy and Spain. This report can be used by operators, software developers, content developers, handset vendors, component makers, car manufacturers and other stakeholders to determine the size and growth rate of the huge global smartphone OS market.