I was walking around today, and my 3G service was really good, better than its ever been before. Then, out of the blue, I fall back on to EDGE. I assumed that it would just go back to 3G in a few minutes, but it didn't. I then switched 3G off and on, and now whenever I have 3G on I get no service, but I get 5 bars with EDGE. This happens at places where yesterday and earlier today I got 5 bars of 3G. My iPhone is running 2.02. Does anyone have any ideas? Thanks.