That isn't fair. My microwave "doesn't work" until I press some buttons. I leave my bluetooth, wifi and data on most days because I have bluetooth headphones and I want people to be able to send me messages and stuff. Sometimes I turn them off to get the battery to last longer. It seems like it could be quite reasonable for a large group of non-technical users to be quite happy with a phone that turns off the radios when the screen is off.