On Android devices, your contact book (also called a "phonebook") is the list that can be found by tapping the People icon on the home screen. You can easily add people who have sent you voicemail messages to this list from within the Visual Voicemail application. Follow these steps:
1. From your voicemail Inbox, tap on the message whose sender you wish to add to your contact book. The message playback screen will appear.
2. Tap on the Add to Contacts image in the header of your message.
3. Tap Add new contact for a new entry to your phonebook, or Add to existing contact to update an existing contact.
4. Enter information about this contact in your phonebook as desired.
5. When you are finished, tap Save to save the contact information and return to message playback.