Hisense released this budget-friendly (~$185) E Ink smartphone that runs Android 9.0 (no Google Play support). The phone is unlocked, supports English, and works on many carriers. I haven’t used one yet but it’s receiving amazing reviews so far. Here’s a video of it in action, and more information about its features.
Judging from the video, this looks to be by far the best replacement for a modern smartphone and one of the best executed E Ink devices ever made.