When you receive a voicemail, it appears in a list, similar to your email inbox. I believe it is downloaded directly to the phone (meaning you don't have to do the added steps of dialing another number to get access to your voicemail) and can then be played or deleted at your leisure.
That is a food explanation, check out the Apple website and you'll get a munch better idea of what it is and how it works. I love not having to listen to the woman tell me I have a voice mail when I am obviously checking it because my phone told me I had one.
I didn't realize what VV was either. I was calling my cell phone number to listen to my voicemails and I was wasting my mins, lol. I happen to press some buttons in the voicemail screen and I was like SWEET!
I never even thought of that. Indeed, that is the best part about visual voicemail. Having to listen to some stupid long-ass explanation that you have one stupid message, was so annoying. I hate how they talk all slow and stuff, trying to make sure you understand them.
I SPEAK ENGLISH LADY, LET'S GET THIS SHOW ON THE ROAD! lol