https://www.techradar.com/news/oneplus-wont-make-a-mid-range-phone-until-at-least-2021

It looks like you won't be able to buy a follow-up device to 2015's OnePlus X, or at least not until 2021.

OnePlus CEO Pete Lau has told Gadgets 360 the company intends to only offer one flagship device at a time for the next three years, following the release of the OnePlus 6.