I don't have one, but I was under the impression cellular versions of Apple Watches can be used independently from an iPhone. You can take calls, send messages,

I don't have one, but I was under the impression cellular versions of Apple Watches can be used independently from an iPhone. You can take calls, send messages, stream music, etc. miles away from a phone, as its connectivity isn't through the phone its through its own onboard cellular modem. Now, do you have to have some kind of iPhone somewhere for it to do things like route messages through iMessage? I don't know.