My main criteria for a phone are: small, has a headphone jack, and isn't a low-end POS. That leaves an extremely limited set of options.
I'm dismayed that there isn't much choice if you're looking for a phone that can be comfortably operated with one hand and fits easily in a pocket. Make an S9 mini, Samsung.
It has backlight bleeding around the ambient light sensor. I can't replace it, but I can live with it.
GMSArena reported Sony is working on a Compact with 5-inch screen and 18:9 aspect ratio. This will be the perfect phone to own.
Samsung actually does have a not bad small device - the A3: https://www.gsmarena.com/samsung_galaxy_a3-6762.php. Problem is that it doesn't work with the US LTE bands I need it to. Right now I'm waiting to see what the iPhone SE 2 looks like...