I have a motorola/nextel i530 cell phone. This is actually my uncle's old phone and he's letting me use it now, so I have no information on how to work it or any original paperwork or anything.

So here's my problem...I go to voice mail and it asks for my password. I enter it...then it asks for my phone number...so I enter it...then it asks for my mailbox number and I enter my phone number again. Then I hear a recording of my uncle's voice asking to leave a message. Except, I want to hear the voice mails that people left for me and I can't figure out how. What's the problem here? How can I resolve it?