Awhile back I changed my voicemail over to youmail's service. While it's nice I'd like to go back to the factory AT&T voicemail. I googled for hours, called 1-800 MY IPHONE and AT&T. No one could help. When I asked AT&T they put me on hold for 5 minutes. Came back and asked if I forgot my vm password. I said no. I need the gsm code. That you type in the keypad that starts with *#. They put me on hold another 5 minutes. Said there is no number and reset my vm password. So can anyone here be my savior and tell me the gsm code to change my phone back to AT&T voicemail. Or tell me the number for AT&T voicemail.