WiFi is not the same as 3G but I guess you know that.

WiFi is almost automatic with my machine so there is not much to tell.
The launch bar(top bar) has the available connections listed, and
selecting one of them is all I have to do. The 3G connection is under
the mobile broadband heading. If it fails to show there then you likely
have not ejected the memory device that should show up on your desktop
with the name of your phone service. You can change the setting to
automaticly connect under admainistration>Preferrences>network settings.
Just select the connect automatically button and that should do it.