I was at a concert last night and before we went inside we had a strong 3-4 bar 4G signal. The concert was at an outdoor amphitheater, once inside we were all trying to "Check In" in on facebook upload photos and other such nonsense. None of us could get the 4G signal or even 3G, basically no internet connection. After the show and back outside in the parking lots just a few hundred feet from the outdoor amphitheater we had full strength 4G signals. My question, would, could, should anyone be stopping the signals on the inside to prevent the possible live streaming of the events and activities at the concert? And is this even possible?