I'm going to cozumel in a few weeks and this is what I want to do. I don't want to use the network at all The hotel has wifi now if I turn on air plane mode and then switch on wifi I can use skpye and make calls to skpye for free I also have skype out so I can call landlines, I tested this last night and it worked fine. Now the problem is one of my friends that are going just called AT&T and asked if we would be charged anything if we did this and they told him yes. Now I did not talk to the ATT person but how would this be possible if the cell radio is off. I just think the rep did not know what he was talking about. I saw on here you can call and have the int roaming turned off.. Anybody ever heard of this???