Cell service vs hotspot
Do I need to pay for separate cell service or hotspot works
Question marked as
If you own a GPS+ Cellular watch and you don't want to have your iPhone with you constantly, then you need to set up a cellular plan with your iPhone cellular provider, assuming they offer a cellular plan for Apple Watch. Otherwise, you can use either a GPS+ Cellular Watch as a GPS only watch, but your cell phone must be nearby for the watch to function for messages, email, phone calls, etc.
