The latest figures on the global premium smartphone market reportedly show that OPPO increased its share of it by a stunning 863% in 2018. This stripped out comparable performances on the part of competitors such as Xiaomi and even Huawei. On the other hand, it did not threaten Apple's place at the top of this market.
https://www.notebookcheck.net/OPPO-named-as-fastest-growing-OEM-in-2018-s-premium-smartphone-space.419223.0.html