Global smartphone shipments grew +6% YoY in Q2 2017. Android gained share at the expense of all other platforms, due to solid performances in China, India and other emerging markets. All other platforms lost traction, particularly Microsoft and Tizen. Our extensive report contains global smartphone shipments by operating system by quarter from 2009 to Q2 2017. The report is valuable for mobile stakeholders who want to size the huge market for smartphones and operating system market share.