how do I get voice mail to stop asking for password?

How do I get voice mail to stop asking for a password? No I do not want to reset it, I never set it in the first place. I do not want a password, never had one, don't want one now, how do I get voice mail to stop asking for a password every time I turn on the phone? Even when I don't have any voicemail? And why do I have to go through all this extra work just to search for a question on the apple website?