FYI, when I click on your link below to reset the app, I get the message "An unexpected error has occurred."
Concerning my WiFi setting, it is generally enabled. While it is possible that WiFi is down for an instant now and then, cellular data is always on... so I'm still unclear on the meaning of error message 9004... Who or what "can't connect" to my voice mailbox? And why am I getting these error messages when I can test my VM by sending myself a VM message and find it to be working fine?
Personal information removed as required by Verizon Wireless Terms of Service