As of about 9:30am this morning the 3G Network in SoCal has become totally flakey. I stopped by the AT&T store this morning because I thought something was wrong with my phone; it wasn't, they admitted to wide spread 3G failures. This means that not only does the data not work, but it also causes most calls to drop or fail (90%+ failure rate on attempted calls) If you turn OFF the 3G, it will continue to work. Settings -> Network -> 3G Off Then turn the phone off and back on. They suspect that it may be this way for a few days.