One way to find out: Set your computer to use the OpenDNS servers, plug in your phone to the computer, and enter in an invalid address, (such as
www.butt****bonanza.com), do you get an OpenDNS error message on your phone? If so, you are routing through your computer. No data is used. Try
http://www.butt****bonanza.com/groovy.html It connects to absolutely nothing.