I've only really started using it recently, and I can watch an entire Doctor Who episode at full quality with only 4 bars of service (iPhone 4). At weaker signa

I've only really started using it recently, and I can watch an entire Doctor Who episode at full quality with only 4 bars of service (iPhone 4). At weaker signals the quality drops before it buffers (I'd honestly rather it buffered). Of course, I'm not in SF or NYC or anywhere else with notorious bad AT&T service.