That was my impression too, that the phone would prefer to us WiFi over cellular data when WiFi was present. I didn't think there was a need to set Cellular Data to off if you are on WiFi, but after reading some posts above, i am beginning to doubt that.So if you have Wi/Fi toggled on, and you walk into your house where you have Wi/Fi, does it automatically start using that and stop using 3g and save battery life that way?
Thanks.