I'm having a problem with my voicemail that the service provider can't seem to figure out either. I tried calling Motorola directly, because technically, they should know. I had my phone number changed, and everything seems to work fine. Until I tried to check my voicemail message by going to "Messages" and then to "Voicemail" and hitting call. When I did that, it would send me to the old phone number and in turn say that it was disconnected or no longer in service. So I reset all the settings, put everything back in. Now when I do that same thing to get to the voicemail. I get an error on the screen that says Invalid number. I was wondering if their was a setting hidden in the phone to tell it what number to dial for voicemail. If anyone knows how or has any information on this, please let me know.