In 2017 Apple introduced its first OLED iPhone (the iPhone X), and in 2018 its smartphone range include 2 OLED phones (the iPhone XS and XS Max) and one LCD phone. Earlier estimates suggested that in 2019, Apple's will move exclusively to OLED in all of its smartphones. But a new report suggests otherwise.
Known Apple analyst Ming-Chi Kuo says that in 2019 Apple will continue to use an LCD display in its entry-level smartphone. The 2019 range will include two OLED iPhones (5.8" and 6.5") and the LCD model will use a 6.1" display - a similar lineup to the one they have in 2018.