Something tells me that even with an LTE Apple Watch, it will still be dependent on the iPhone or at least tied to owning an iPhone. Here are my thoughts why: I doubt there will be room for a physical SIM. I'm thinking you will somehow provision the Watch through an IPhone. It will be an extension of the phone with a separate LTE radio but not separate plan or phone number. Perhaps this will boad well for carrier plans for a Watch (e.g. it will be only $5 more per month to have an IPhone/Apple Watch Plan vs just a iPhone plan). This would make sense since the Watch isn't a major data consumption device like an iPhone or iPad, so the carriers may be willing to do this. If the Watch were to have stand alone calling capability, I'm sure there would be significant cannibalization of iPhone sales (think teenagers, retired people, etc). Im sure that's one reason the iPad lacks this capability and, in part, why the Apple Watch was designed as a companion device to the iPhone. Despite this it would still be super convenient to have an LTE enabled Apple Watch for those times you want to disconnect but not miss important messages. I have a Series 0 and have not seen a compelling reason to upgrade thus far, but LTE capability would get me over that hump.