Yep! You can accept and make calls with an Apple Watch, even with the non-cellular version, as long as your phone is in bluetooth range. It even works without b

Yep! You can accept and make calls with an Apple Watch, even with the non-cellular version, as long as your phone is in bluetooth range. It even works without being connected to headphones, although I can't recommend that for long calls. With the cellular version and the appropriate mobile contract you're not bound to the iPhone bluetooth range anymore.