Ever since I upgraded to WM 6.5 (Samsung ROM) my data coverage has suffered. ATT was no help. Basically, if I use IE 99% of the time all is fine. When I use MediaNet or try to use ActiveSync to Exchange I get "no network error". I have tried syncing the phone in 5 or 6 major cities in the US and all have the same issue. Normally I am on ATT Edge, but 3G same results. If I watch the signal icon it will go from E to an antenna looking icon or from 3G to the antenna and I know from that point it will fail. The failure is about 80% of the time. It is like WM 6.5 is having issues with the radio. Under 6.1 all worked fine. Any ideas?