A fully paid Verizon Watch is unlocked, but SO many are bought with monthly device credits in place from a promotionally reduced purchase price that in my experience, you have to be aware that Verizon is NOT always a green light. If payments are going on, it's going to be locked. I have had Verizon, ATT, and Comcast cellular service, and each carrier has their unique "features." Verizon is the safest bet, and ATT is downright draconian with the devices, locking them up so they can't even be used on alternative carriers even IF they are paid off. And Comcast has been remarkably good for BYO. Verizon's $5 AW plan can't be beat if you are paying top dollar for their premium unlimited.