Ok heres the deal.  I bought a T-mobile branded Samsung Memoir.  I unlocked it to AT&T.  I love it.  I got the MMS and Browser settings off another forum, and they work fine.  One thing that is bothering me is ever since I got a voicemail, there has been the little icon just to the right of the bluetooth icon that shows I have a voicemail, even after I have deleted the voicemail and it won't go away.  Also, I just got a new voicemail, I decided to save it.  Now every few hours the bubble pops up that says "One new voicemail." with the "DIAL" and "EXIT" options.  MY questions is what are the AT&T voicemail settings so I can get rid of this annoyance.

I had the same problem on ATT with an unlocked T-mobile T929,  and I found a solution but it requires a second phone.   I inserted my SIM card in an ATT Eternity I keep for a backup [great phone!],  sent myself a message,  listened to then deleted the message and exited VM using the * button.   When I replaced the SIM in my Memoir the VM icon was cleared.  Hope this helps someone,  very annoying problem.