[solardev]

You just need a prepaid plan from anyone. Typically the MVNOs offer better deals than the major carriers.

In the postpaid world, I use Google Fi and love it, but I don't think they have a prepaid plan (easy to cancel though). I also tried USMobile (https://www.usmobile.com/) and they were OK. Cheap but kinda a hassle.

Starlink also has a free trial, if you want something that doesn't depend on local cell towers being up.