XM => XFinity Mobile
When I have calls forwarded from my home phone XFinity Voice account to my iPhone on XFinity Mobile it rings both phones one time and responds with the message "Your call has been forwarded to an automatic voice messaing system...blah, blah".
I never get the chance to answer. But if the caller tries again immediately, it works as it should...rings until I answer it. This only happens on my phone. If calls are forwarded to my wife's phone it works correctly every time.
Solved! Go to Solution.
I should add that this only happens when the iPhone is locked. I thought perhaps it has to do with Settings -> Do Not Disturb, but I can't reproduce the behavior consistently while fiddling with those settings.