Apple released 3 iPhone models last year; however, the 2 more premium, OLED-equipped variants appear to have done better in some estimates. This impression was recently reinforced when the company's traditional LCD supplier, Japan Display, was reported as having entered talks to sell a stake in its company to investor groups with the cash to keep it going.
https://www.notebookcheck.net/Apple-s-switch-to-OLED-for-iPhones-results-in-display-supplier-woes.397151.0.html