The latest data from Strategy Analytics, which tracks global smartphone shipments, shows that iPhone X was the best-selling smartphone in Q1, 2018. Rounding out an impressive quarter for Apple, its iPhone 8, 8 Plus and iPhone 7 models took out the number 2, 3, and 4 positions, respectively.
https://www.notebookcheck.net/Apple-has-4-of-the-top-5-best-selling-smartphones-in-the-world-iPhone-X-no-1.302246.0.html