Not sure how much more I can elaborate, selenium doesn't work at the
protocol layer, it works at the web page layer.
Web Page <----- (selenium-rc operated client visits URL to web
server)
-------------------------------
Web Server (accepts http/https protocols)
-------------------------------
OS/Network interface
-------------------------------
Network Hardware
Selenium-IDE or RC only works with the top level (Web Page). It
doesn't have the mechanisms or means to handle anything else. You
could write your own support and tools if desired.
Basically, if you have a browser and it can see the website under test
manually, then selenium can too.
However, if I understand your situation correctly, you want to test
mobile (hence WAP). It would involve having developer access to a
bunch of mobile phones, getting the java JDK installed, selenium-rc.
Then kicking off the built in browser. The list is pretty long for
supported browsers but I don't recall any mobile browsers outside of
Safari.