I have been with AT&T for over 11 years.
I made a payment arrangement online & got my dates/days mixed up. I needed my arrangement extended from 12/10/2015 to 12/11/2015.....ONE day. I was told my two different reps & one supervisor that this was not possible because there have been changes to AT&T's policy. When I asked why customers were not notified about changes that directly affect them, the answer I received was that it was a system change and they're telling people as they call in. How sneaky! ONE day...seriously?! AT&T is willing to trade 11+ years for ONE day. Well, I am going to be trading 11+ years for a new wireless carrier.
So FYI to anyone wanting or needing to extend/modify a payment arrangement.....YOU CAN'T.