Newbie question on Apple Watch 4

[donawalt]

HI all, I have ordered a GPS-cellular Watch 4 for our daughter for her birthday (she is adult age). We have an AT&T family plan plan for our family's iPhones and iPads. My question is, in setting up the cell service for the watch, since I have not ever set up a watch before, what information about my AT&T account will she need to set it up? Or will she not be able to add it to the AT&T account and I have to?

Sorry if this is too newbie a question, I have checked all the articles on setting up the watch and none go into more detail than just "set up the phone with your carrier".

Thanks!

 

[Vanilla35]

Whoever is the account holder or has access to the passcode/number verification (whatever ATT uses, it's been a decade since I've been with them) should be able to make those sorts of changes. I think when I was with ATT it was only the account holder, however with T-Mobile anyone who has the passcode can make authorized changes.

It would be a similar process to adding a line. If you know that you are the only one with authorization to do that, then it would be the same with the watch.