0 of course, but wasn't 3G all shut down in the US in 2022 to open up the airspace?

One of those HN myths that comes from only being willing to Google (or ChatGPT) information, rather than encountering it in the real world.

3G still exists in rural and remote areas that no major carrier wants to serve, at least as of April, 2025 — the last time I did a round of real-world web testing. Next round is in September. Maybe with 5G in the cities, some hand-me-down 4G equipment has made it to the places where I test.