Least qualified user asking for advice

[TRS-80]

So far, I have had good luck with Walmart Family Mobile GSM sim (which I'm pretty sure uses T-Mobile towers).  Everything[0] works including quite fast 4G data[1] and even VoLTE(!).

I read a bit before making that choice (check the forums yourself if you like).  And I don't remember reading about any black listing nonsense, nor other jumping through hoops (like Verizon apparently make you do), etc.  Everything "just works" so far.  I was even able to purchase the SIM card and service with cash (at any Walmart) and use a fake name (only an email address was required).  Putting it all together is why I am very happy (so far) and why I continue repeating my experience in various threads.

I only started seriously using the phone as daily driver maybe a couple weeks ago.  So still very early days.  But I drive all over the US for work, I am off this week but really looking forward to going back so I can do more thorough testing all over the place and report back my findings.

[0] Well not MMS, but that's being worked on and is very close.  In fact I think you can even get it working now if you are willing to get your hands a little dirty at the command line.  Point being, that is a software, not a carrier/service, limitation.

[1] Today I tested (via https://speedof.me) 40-45 Mbps down and 5-15 up.  I seem to recall similar (what I consider to be pretty good) speeds when testing previously.  But I want to do more testing, from more locations, before I can really swear by it.