Global smartphone shipments grew +28% annually in Q2 2021. We estimate the top 20 families of models accounted for nearly 8 in 10 of all smartphones shipped worldwide during the quarter. Apple and Samsung top the charts, but Xiaomi’s Redmi, Mi and PoCo series, OPPO's A, Reno and K series, vivo's Y, IQOO, and X series, Lenovo-Motorola's G series, Realme's Narzo and C series, Huawei Ascend and Enjoy series, as well as Honor Changwan series are on the list. 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 2021. 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.