Ah, pardon my ignorance, but...

Can I use a 802.11b 11mbs connection with any program or software to
make local phone and/or long distance phone calls?

I have heard about VOIP and Vonage. Can either of these be used and does
it require special software and or equipment on both ends?

What wifi connection factors determine if a reliable connection can be
made and how do I check for these.

I really need to find an alternative to my local phone company which
keeps putting fraudulent charges on my bill. The gov. here does nothing
when I complain. Cellular does not seem to make sense either since I
hear a ton of complaints from cell users, not to mention their
connections are usually so flakey. I don't want Cox cable either.