The plans obviously exist at least at the wholesale level. These: https://shop.blues.io/collections/development-kits/products/raspberry-pi-starter-kit?_ga=2.22

The plans obviously exist at least at the wholesale level. These: https://shop.blues.io/collections/development-kits/products/raspberry-pi-starter-kit?_ga=2.221021144.1500543506.1638750055-1973987371.1638750055 https://shop.blues.io/collections/development-kits/products/... Come with pre paid 10 year internet data plans - but with a 500MB data limit (which you can top up), all for $79 including the hardware and interface board. In raw bytes, that'd be enough to send 1000 140character SMS messages a day every day for 10 years. Realistically, there's probably a 10x or 100x overhead for the TCP/SSL/transport/application layers, but you'd probably still get al least 10 140byte payloads a day for a decade with one of those. (Full disclosure, I have no affiliation with Bluers.io, but I did impulse buy one of those when they first appeared on my radar, which is sitting in the huge pile in my Box Of Unstarted Projects And Broken Dreams.)