My voicemail quit working after I stopped using Robokiller and tried reverting back to standard voicemail. People calling me would get directed to voicemail, but when I looked in Voicemail, I always had zero messages. I know I should have had messages because I got a text asking me why I wasn't responding to voicemail. So I called *86, then selected option 2 and sent a message to my phone number. That worked, my voicemail started working. Only problem is that any old messages that should have been there were not there.