Correct me if I am wrong but doesn't it only take 1 option to allow VVM?  I mean if it was a BB Bold all I would have to do is check a box and I am done. 

If I am not mistaken the only difference from normal VM and VVM is how it is stored and broadcasted to the phone so unless the WP7 uses a new system unknown to ATT the option only needs to be activated so my old VM box is removed and my new VVM box is activated.

I realize it maybe a bit more then that but if I were to change my phone from the Focus to a Bold in my profile would I be able to check that VVM box just to see if it works or is that out of the question?