Does the 7 series have Apple Watch that does have to be on a plan. One you can connect with your iPhone?
Does the 7 series Apple Watch work without a plan? Can you use GPS & blue tooth to connect it directly to your iPhone?
iPhone XR, iOS 15
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You do not have to have a cellular plan to use the watch.
It will work as a GPS model and pull data using it's connected iPhone.
See Use your Apple Watch without your iPhone nearby - Apple Support (CA)
