Payment from Savings Account OK?

Can I auto-pay my monthly T-Mobile bill from my bank savings account?

The T-Mobile policy states that either a bank checking or savings is acceptable. However, while I was able to successfully setup my savings account for payment, T-Mobile could not withdraw my bill from my savings account.

After encountering T-Mobile late fees and losing my auto-pay discount, I successfully setup my checking account for payment and was able to make a payment.

I use my savings account to successfully make payment to other vendors and I have spoken with my bank to ensure that they haven’t recently implemented additional security procedures and they have not.

Spoke with T-Mobile customer service and explained my experience. They said they'd dig into what was causing the issue further and would get back to me later that day or the next. I haven't heard from them and really don't expect to.

Is this issue particular to me or are there others who have experience the same? If no resolution, I'll simply need to direct my payment to be withdrawn from checking account.

Gracias.