hi, i have tried several times messing with the "visual voicemail" app from t-mobile. always, with bad results. so i decided to get to the bottom of it. i called t-mobile customer care(i love their customer service) and i got a really nice guy who was really cool. we talked about my nexus one, ect.., well here is what he told me. he said, visual voicemail is a constant problem for us, it has very bad problems. volume issues, ect.. he said, your best bet is to unistall and not use it. this is not the answer i wanted, but it is what i figured. i thanked him for being so honest. i uninstalled it for now and will re-try it in 6 months or so, to see if they can work the bugs out. hope this helps someone.