We just got a tip that while the upgraded BlackBerry Bold OS for AT&T won’t be released until Tuesday, the feature code for Visual Voicemail for BlackBerry handsets is in the system. You know what that means, right? If you’re running a Bold OS that has the Visual Voicemail icon on it, you can call up your friendly AT&T customer service rep, ask them to add the Visual Voicemail feature to your account, and you should be good to go. We’ve confirmed this with one of our Bolds — let us kno