Have a friend that's having an issue with his phone. It's an LG LS 660 on Boost Mobile. He enabled visual voicemail on it (I don't know if he updated something, or clicked an option somewhere or what). This has somehow eaten nearly all of the remaining memory on the phone to the point that it can't update a single application and can only store 1-2 photos before he has to delete them to take any more.

Is there a way to disable or uninstall this? The phone seems to be in a death spiral at this point, giving more and more notifications that there's not enough storage space left.