Hopefully I can get my office to add my Apple Watch on the same AT&T account, but could I pay separately for it on a completely different account and still pair it with my phone to use my same number for calling/texting? AT&T 611 seemed to suggest it doesn’t matter on which account the watch lives and once it’s paired, it will work, but it made me question how the service works. Does a watch receive a unique phone number that it uses or just keeps in the background? Thanks!