When you first open the Phone Tool, you will be asked to enter your number to save as a Voicemail contact. For many carriers calling your own phone number and entering a pin password will allow you to access your voicemail.
*That pin could possibly be something like 1234 or 9999. You might also try the last 4 digits of your current phone number, your previous phone number's 4 digits if you switched to a new number, and or the last 4 digits of your social security number.
For more detailed information on Voicemail, we suggest contacting your carrier to ensure you can access your voicemail correctly on your Wisephone.