When I returned my 3G iphone for the 4th time due to the dropped calls that occur when the iPhone try's to hand off a call from 3G to EDGE, the Genius told me that this is to be expected. She said that AT&T's network does not support a seamless hand off between 3G and EDGE. "The network is not currently equipped for that" she said. Is this statement accurate? Really? Anyone has some real knowledge about this?