My cell phone stopped working without notice on a new account. My credit card was on file with Verizon but the auto-pay didn't work as expected.
It was always my intent to have auto-pay enabled (but it is possible that merely registering a credit card does not automatically enable auto-pay).
The auto-pay option is not listed in the account menu.
When I tried to call Verizon, I accessed the Support page where I found the "We'll Call You" option would not allow me to enter a date or time and the "Call Us" option would not provide a phone number. I ended up locating a contact number on the internet (non-Verizon site) where I was lucky that the customer rep was extremely supportive (he gave me a one-month discount and got my phone working again).
In summary, it was a very confusing and time-consuming process which I would rather have avoided.
User's recommendation: Make sure you are actually enrolled in auto-pay.
Location: Bethel Park, Pennsylvania