AT&T Iphone trade in question

Ok, bare with me....

I was just chatting online with an at&t rep as i need to pre-order a new Iphone X, my 6+ is close to the end. Anyway, she tells me that any phone valued over $20 would be available for a $300 credit. She even went so far as to say that my iphone 5 valued at like $36 would be elligible for that $300 credit...and that i could trade in both for an estimated $600 credit. That seems too good to be true.

I've read through their site the best i can, and the only thing coming close to that claim is the following language..."Get up to $300 in credits when you trade in you iPHONE 7 PLUS, or up to $200 in credits on other select devices"...

Now, as i have a 6 plus and not a 7 plus it would seem the most i'd be elligible for credit wise is the $200, however she's assured me that any phone valued at more than $20 is elligible for $300 credit.

I'm just curious if any of you At&t users have come across this. I'm going to stop in the store today and ask, but more knowledge is better.


ETA: Opened up another chat with someone else, and the lady i previously spoke to was so full of shite. The second person seems to think she was talking about a samsung credit or something. At&t ftw. fricking retards. So no special credit other than what your phone is valued at.