I don't have a N9 yet and I would like to know more about the features of the phone.

I know that we can download maps using Wi-Fi and use the maps later. However, I did some search on the web and found that Nokia Maps in N9 requires data connection to work. Is this true? (if this is true, what is the point of downloading maps in advance?)

Straight to the point, can I use the full functionality (locate myself, search for destination, search for routes, etc...) of Nokia Maps in N9 without having a sim card?

Thanks very much for all of your helps!