Lol, as if Apple would let you off that easily! The watch can't have a cellular plan of its own. It must be associated with the plan that's on the iPhone it's

Lol, as if Apple would let you off that easily! The watch can't have a cellular plan of its own. It must be associated with the plan that's on the iPhone it's tethered to. If you use a dummy iPhone for this purpose, then the SIM for your primary number needs to be on that phone.