Avoid doing business with this bank at all costs. I'm actually surprised Apple would hitch their wagon to this antiquated company.
1) They have never successfully auto-processed a payment from my Suntrust checking account. The account and routing numbers have been verified and reverified, and are serving my mortgage, autoloans, and health insurance premium payments perfectly. However, once I place a call and wade through telephone customer support, they are able to manually process the payment.
2) They are one of about three payees in the entire United States that is unable to process a Mastercard debit card as a payment source. The IRS, my mortgage company, even rental car companies use this very same account number for payments and handle it perfectly well.
3) There is no way to pursue any resolution beyond what the CSR phone bank is able to provide. They're nice enough people, and I do my best not to be snotty with them, but the company they work for is a smoldering tire fire.
When the iPhone 7 dropped, I did the math nine ways to Sunday to find that the Apple-financed option resulted in the best combination of low (no) out-of-pocket and monthly payments. The cost, however, has been the monthly annoyance of a journey through a phone tree to ask a human to do the thing that their system can not.
A failed endevour all around, and one that Apple would do well to shed itself of.