John615 I had considered Ulefone, but I ended up buying an Oukitel C15 Pro back in 2018 when my Samsung died. The price range was the same, USD 100. It came with Android 8, though, not Go, and the OS could not be upgraded due to a bug (the only bug I actually did not mind about :-). It took a while for my eyes to adjust, but afterwards the phone became usable. I should warn that since the beginning I have noticed huge brightness oscillations by the naked eye upon turning the screen on and at random times. The flicker subsides after a few seconds, but there might be flicker going on that is perceived by the brain and not by the eyes. It does not bother me, though. Also, the brightness scale has dimmed a lot since the purchase, and the camera is awful. But, before settling on this phone, I had bought and returned / resold six top-notch phones so I made the call to keep it. Not sure why this bad phone is usable, maybe its low resolution is good for my eyes.
Be aware that some of those low-end phones that you listed may suffer from similar issues. You get what you pay for.