When you get a voicemail it shows up on a list just like email. There is no special number to dial. No codes to remember for navigation. You simply click on the call item in the list to hear the message. You can pause it and restart it over and over. Delete it by simply tapping on the trash icon.
Very simple interface besides that. There is a convenient speaker button on the screen to make it easy to hear your messages through the external speakers. You record and change the greeting by tapping a Greeting icon and speaking into the Microphone.