Apple build something like this into the Apple Watch, I think. https://techcrunch.com/2017/09/12/the-cellular-enabled-apple-watch-has-the-sim-built-in/ https:/

Apple build something like this into the Apple Watch, I think. https://techcrunch.com/2017/09/12/the-cellular-enabled-apple-watch-has-the-sim-built-in/ https://techcrunch.com/2017/09/12/the-cellular-enabled-apple...