AT&T/T-Mobile Deadzone On One Side of Empire State Building

I spent the week in New York City participating in the ThinkMobile conference. It ended this afternoon. So, I decided to walk down to the Empire State Building and visit the 86th floor observation deck. The video above was recorded using a Canon PowerShot G9.

I discovered that neither my T-Mobile nor my AT&T Wireless phone could get a signal on one side of the building. However, both had 4 bars when I went around to the other side.