OPPO is one of three manufacturers, whose smartphones entered the top-10 best-selling last year. Moreover, its budgetary A37 by popularity lost only to the four models of the iPhone (7, 7 Plus, X, 6S), overtaking all Android-smartphones. Not too far behind models A57, R11, A9S, but the international line F in sales is still invisible (like the V-series Vivo). In Xiaomi, among the ten most popular models, nine are in the Redmi lineup (Note 4, 4A, 4X, Note 4X, Note 5A Prime, 5 Plus, Note 5A, 5), and only Mi6 could penetrate the top 10 from the flagships. The exact opposite is Huawei, whose most successful smartphone was the P10, with a total of 7.7 million devices.