At my office I only seem to get the Edge network. IN the past few days however I discovered that if I reboot the phone it will actually log onto a 3G network and will stay like that for a while. Later on it will eventually go back down to E. And again, if I reboot ..... There is quite a big difference in performance between the two, but evidently both are available. My question: why does the iPhone tend to "prefer" the E network ?? thx !