Global smartphone shipments increased +6% annually in Q2 2017. We estimate the top 20 families of models accounted for nearly 7 in 10 of all smartphones shipped worldwide during the quarter. Apple and Samsung top the charts, but Huawei's Ascend and Honor, Vivo's X and Y series, Xiaomi's Redmi, OPPO's R series, LG's K series, Lenovo-Motorola's G series are quietly gaining traction. Our extensive report tracks the world's best-selling, top-20 smartphone families and top-50 models by shipment volumes from Q1 2011 to Q2 2017. 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 families and model.