I called AT&T this morning to inquire as to why my visual voice mail was not working on my Nokia 900. The reply that I got was that they do not currently have a "code" to add VVM to a unlimited LTE plan as I currently have. The only way to get it added was to downgrade to a capped data plan, which I will never do. He suggested calling back in a few weeks to see if they have added a code yet to add this feature to my plan. Sucks.