To change your voicemail password, you must know your current voicemail password. Note: If you have forgotten your existing voicemail password, you will not be able to access Voicemail until you reset your voicemail password.
From the home screen, tap Apps. Note: The Visual Voicemail application must be installed to complete this process.
Swipe to, then tap Visual Voicemail.
Press the Menu key.
Tap Change voicemail password. Note: Alternatively, to change the voicemail password by calling into the IVR service, from the home screen, tap 'Phone' > Tap the Voicemail icon, or press and hold the 1 icon on the keypad > Enter your current password (if prompted) > From the main voicemail menu, tap the 4 key > 2 key > 1 key > 1 key.