I put this in the iPad section because I went with the wifi after having an AT&T 3rd gen. My iPhone has a no longer offered unlimited data plan and rep told me I should stick with it. Anyone else in the same boat as far as data for tethering for the iPad? I thought about finding a way to see how much data I use and possibly downgrade my plan so I could tether? Or is it more expensive to have a plan with tethering ability?