have no idea what you are talking about. If you BYOD, you get no discount.
They are incorrect friend, just off on the correct date tiers from the person you were quoting, right now we are currently still offering a Month to Month promotion that mimics the Edge program discount. In my opinion it is to show people out of contract how the discount would work for them and then the discount just switches from that to Edge discount and they just re-add the phone cost.
So yes if you are a monthly customer right now you can qualify for a $15 discount on plans from 500 MB - 4GB and get a $25 discount from 6GB+ plans. This is a limited time promotion so please lock it in until you get your next device and save some money if you are currently out of contract on latest More Everything pricing!