I’m gonna take a wild guess, based on my knowledge from about 10 years ago, that your best bet is going to be prepaid providers. Dunno what they’re doing nowadays, but I used to use a Tracfone Wireless phone, which cost $20–30 at Walmart for the hardware, and iirc about $60 per 120-minute card—although there were frequent promotions, so I acquired coupon codes for my family when I was in high school to help save money. The unfortunate thing was that it cost 0.3 minutes per SMS. Also the deal is that you have to buy minutes every so often to extend your service period. Anyway, if they’re still doing a “basic hardware” type option then that could be something to look into.