Why we love to use iPad indoors — WiFi
By analyzing data from a live 3G network in a major city, the mobile network analytics firm Actix has found that only 5% of iPads are used outdoors. iPads account for just 1% of data sessions, they use 4X more data than an average 3G device.
http://feedproxy.google.com/~r/TheAppleBlog/~3/lM7z15Kebmc/