Apple Watch SE
Can you use the watch without it's on phone line?
Apple Watch SE, watchOS 10
Question marked as
You need an iPhone, but you do not need to give the Apple Watch a cellular service.
AS LONG AS your iPhone is nearby, a paired Apple Watch without cellular, will do EVERYTHING a cellular connected model will do.
I’ve been using a GPS only series 4, going on 5 1/2 years.