my wireless internet

First of all I want to thank everyone for helping me and answering my last question. Now I'm confused though. I was able to connect to the Internet by clicking on the Internet icon at the top right of my screen and then selecting Auto Mobile Broadband (CDMA) Connection. So my question is how is that possible if I don't have the software for my wireless internet card installed and is the connection through verizon wireless which is who I bought the receiver from and pay monthly for wireless internet? And if you didn't read my last question it was about how to install the software but I found out that I couldn't install it because the software for my wireless internet is for windows and not ubuntu. So again the question is if the signal I'm picking up with the receiver and connecting to the internet still through verizon and am I paying for it even though I dont have the software for the receiver installed.