When does the billing period start on a new account?
I am not currently a customer, but the home I'm moving into has AT&T Fiber available. I won't be moving for about 3 weeks, but was looking to order the modem early online as a preparation. I will be doing the self-installation. When does the billing period begin? As soon as I receive the modem? Or after I've installed it and have officially set up the service for use?