So I've recently been turning off 3G just to conserve battery power and running on Edge. I don't notice any difference in cell call quality so I don't miss 3G. One thing I saw on the phone though was weird. Usually there's the big "E" to signify you're on Edge, every once in a while the "E" is gone and there's a dot in it's place. Last for 10-20 seconds maybe then eventually the "E" comes back. Anyone know what this "dot" is?