Don't Wait If You Want a 3.5mm Headphone Jack
This almost goes without saying at this point, but if you want a 3.5mm headphone jack on your next phone, you'll have to go with something other than the iPhone.
While companies like Samsung continue to appease those who still like to used a wired connection, Apple no longer offers a 3.5mm headphone jack on the iPhone.
We don't expect the 2019 iPhone models to bring it back, their designs will reportedly mirror the 2018 design, and we'd be shocked if Apple brought it back on the 2020 models.
Fortunately there are some great devices on the market right now with a headphone jack. Among them, Samsung's Galaxy S10.