This is something I think as well. But what's stopping manufacturers from putting 4G chips inside of it? I have no clue how trivial this is. But I'd assume it

This is something I think as well. But what's stopping manufacturers from putting 4G chips inside of it? I have no clue how trivial this is. But I'd assume it is, in which case you're only really "safe" if you open it up and inspect it yourself I guess.