https://techcrunch.com/2017/09/09/the-next-apple-watch-will-have-lte-cell-service/

Last night an iOS 11 GM download link made its way onto Reddit, which 9to5Mac discovered and has been digging through.

You can check out the full list of discoveries here, but one big thing that stood out is that the next Apple Watch (or at least one version of it) will finally have LTE cell service, meaning it doesn’t need to be tethered to your phone at all times. The leaked screenshot above shows a LTE signal strength indicator in the top left corner of the watch.