when do per-minute rates kick in on autopay?

[Zaffer]

Hi,

I have the basic plan for 500 minutes at $35.00.  Right now I have 159 minutes left.  If I go over 500 before the due date for my autopay, but have extra money in my account, will the high, per-minute rates kick in, or will the extra money be used to avoid the higher, per-minute rates?  I hope the extra money will be used to avoid the per-minute rates, because then I could add more money to meet my autopay balance.  Thanks. 

Zaffer

[hmcc317]

When you go over your 500 minutes, you will be charged the per minute rate at .25 cent per minute, and that .25 per minute will deduct from your balance.