I hope someone can offer a solution to this problem.  I get the "Unfortunately, Voicemail has stopped" message when I try to use the voicemail app at all and I also get the "Camera Busy. Camera unable to start. If this repeats please power off your device and restart." Its becoming a serious thorn in my side. I know I can dial the voicemail number but if I'm paying for visual voicemail I want it to work.