Global smartphone shipments surged +40% annually in Q3 2012. Smartphones are a high-growth market. Samsung and Apple top the charts with the world's best-selling models, but Sony, Huawei and HTC are quietly gaining traction. This published report, available to clients of our Country Share Tracker (CST) service, tracks the world's top-selling smartphone families and models by shipment volumes from Q1 2011 to Q3 2012. The report is a valuable tool for component makers, car manufacturers, content suppliers, mobile operators, device vendors and other stakeholders who want to identify and measure the world's most-popular smartphones by individual model, such as Apple's iPhone.