How to Delete Voicemail on Comcast
Comcast is a provider of high-speed Internet, cable television and phone services. Subscribers of Comcast Digital Voice service can make unlimited local and long distance phone calls within the United States, Canada and Puerto Rico for a set fee per month. Users can also check their voicemail from their phone and delete any listened to or unwanted messages.
Press "99" on your phone keypad to access your Comcast voicemail.
Enter your voicemail password when prompted.
Press "77" while you are listening to your message to delete the voicemail.