Although the next-gen iPhone flagships are not expected to feature any major changes in terms of design, insiders familiar with the inner workings of the Cupertino-based giant claim that Apple is currently working on a foldable smartphone that could also be used as a tablet and this device will hit the market in 2020.
https://www.notebookcheck.net/First-foldable-iPhone-could-arrive-in-2020.291290.0.html