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, press and hold the 1 key. Note: Enter current voicemail password if prompted
If you have unheard messages, press the * key to get to the Main Menu.
Tap the 4 key to change your personal options.
Tap the 2 key to change your administrative options.
Tap the 1 key for password options.
Tap the 1 key to change your password then follow instructions to enter a new password.