Many T-Mobile cellular and internet plans come with a $5 auto-pay discount. Beginning in May, only bank or debit card auto-pay payments will qualify for the discount. Auto-payments with a linked credit card will not be eligible for the discount. (CNET)
Hopefully it will still be possible to make manual credit card payments in mid-cycle and still get the $5 discount, provided that the auto-pay is set up with the bank. This is especially important for those who want to make a $10 monthly payment with their Amex Business Platinum card.