If you like suffering from time to time, I'm still using old phone with FreedomPop (still grandfathered in their Basic 200 $1.99/mo, 200 MB, 500 texts, 200 min, needs crappy app plus like $7.99/6 mo for multimedia texts (though it looks like the last time they charged me was Feb & Aug 2020 but I'm still getting images (e.g., pics of location from PO)).
Keep it mostly in airplane mode since it tethers to my phone hotspot or public WiFi when I'm out. Working good since Feb 2019 but before that, every 8-16 mo there would be an issue such as no SMS or can't call or can't receive calls (though only had to change phone # once; usually reset or new SIM).