you might be able to tell by the ip, mine is 10.x.x.x so the cell phone company is obviously not giving me my own internet accessible ip. 10.x is a reserved range if you didn't know. if you have a special data plan FOR TETHERING then they might give you a real IP. My provider, WIND, doesn't even allow outgoing connections without one of those special plans. I mean I get Port 80 and whatever else they think I deserve, but that's about it...