I use T-Mobiles Home Internet in the RV. I've heard of differing reports on if it's within the terms of service to be moving around with it or not, but it works well and is affordable. $50/month for unlimited service. It's good where you have cellular service but with T-Mobile, you sort of have to be near populated areas.
I also carry Starlink on a residential plan w/ portability. It's $135 for unlimited data. You need a clear view of the sky, so forested areas are out. It mostly works good but there have been times that it's slowed down to the point of being barely usable. And, for the night-owls, it seems to glitch between 1am-3am with restarts and whatnot. It also requires setting up at every location and I'm super lazy if my stay is less than a week.
Lastly, I carry both AT&T and Verizon on unlimited plans. But these are old grandfathered plans that I acquired back in 2016 and hold onto like they're gold. But again, they only work when there is cellular service.
In the RV, I use a router and just plug whatever internet source I want to use at that particular location into it.
Officially a SOB with a 2022 Jayco Precept 36C
Checkout my site for RVing tips, tricks, and info
| Was a Fulltime Family for 5 years, now we're part-timing on long trips