ipad newcomer (but several years of iphones before going android for mobile). I had to get the 3g today with verizon (felt lucky to get a pad at all!) and got the 3GB plan. I can cancel in a month if I want. Question... in order to save data for when I really need it... and since I have wifi in most of my regular locations... when I turn on the wifi, the verizon bars are still showing... am I using data? Is there data transmitting in or out in the background ever? Thanks.