First of all, we all already know that Customer Service reps aren't the pinnacle of reliability. We know that. No need to state it.
I called customer service about adding an unlimited text plan. In the midst of the conversation, the rep told me that when the new iPhone comes out, or if I wanted to upgrade to any other phone, I needed to make sure I did so at an AT&T store. He claimed that all other partners would not be able to allow me to keep the grandfathered unlimited data plan, and would end up switching me to one of the new data plans. The only way to keep that plan would be to go to an AT&T store.
Take it for what it's worth
I called customer service about adding an unlimited text plan. In the midst of the conversation, the rep told me that when the new iPhone comes out, or if I wanted to upgrade to any other phone, I needed to make sure I did so at an AT&T store. He claimed that all other partners would not be able to allow me to keep the grandfathered unlimited data plan, and would end up switching me to one of the new data plans. The only way to keep that plan would be to go to an AT&T store.
Take it for what it's worth