I ask because when I turn on Wi-Fi, my Mobile Network widget remains "on" (with the green bar indicating on), and "Mobile Network" in my Networks settings also remains checked. However, if I view my settings through the app Quick Settings, turning Wi-Fi on turns off the "Mobile Data" option (which I assume is another name for 3G). So is 3G off when Wi-Fi is on? Or is it still somehow on and using the battery/searching for signal? Thanks.