ATT Prepaid Autopay & Multiline - Large Account Credit
I have an account with two member accounts attached for multi-line discount, which results in combined $15 savings for the multiline setup. I also have auto-pay enabled, which results in an additional $15/mo savings due to autopay. The monthly service charge (before taxes and fees) after the two discounts is $70.00. If I make a one time payment of $300 on the account, from my understanding, the extra credit will stay on the account and will be used at following months when the prepaid monthly plan renews itself. I have two questions:
1. Will the extra credit cause any issues with the autopay discount? In other words, considering that the amount to charge my credit card by autopay will become $0 (since there is an account credit), will the autopay credit go away, and $85 gets taken from the existing credit, or will the existing account credit just go down by $70?
2. Will the credit get used for the entire multi-line account ($70/mo), or is the credit going to ONLY cover the monthly fee for the top account that has the member accounts, meaning that I will still get charged for the member accounts even though there is credit in the top level?