Last night I went to a friend's house overlooking the Philly Art Museum to see the fireworks. There were literally hundreds of thousands of people outside and all down the parkway. I got service fine at the party 21 stories up, but the minute I stepped outside downstairs... Epic fail. "searching..." and no service. I've never seen this happen before! Does AT&T just give up when there are too many people trying to access the same tower?