"Cell phone service can be shut off to private people and available only to responders in the case of an emergency. This is what happened in NYC on 9-11. Contributing to that was the total destruction of Verizon's central office, at WTC. Many FM's went belly up until they could secure new tower space either on Alpine in NJ or Empire. There is a master antenna near times square if I recall. Even tho the cell antennas near WTC were damaged, the entire NYC cell infrastructure was not harmed."Let me tell you what I know. I am a master control engineer for one of the major national broadcasters and we are located in NYC. We had landline pots service and ISDN until the CO in lower Manhattan lost it's battery backup power. I don't really care if the cell service failed or was taken off line, the results are the same, aren't they? Cell phones and the internet are great under normal circumstances. In an emergency the scale of 9/11, radio is where people can reliably receive information. The Conde Nast tower didn't exist in 2001. Actually, at that time only WCBS had backup space in Empire. Everyone else had to scramble to get a signal on the air and at that time Armstrong couldn't supply the needed 400 volts for high power transmitters. Most of the NY market couldn't receive over the air signals from these backup transmitters. Most FM's had transmitter sites on the WTC, not Empire at the time. Today things are much different with all the backup sites now available, but in 2001 the market was totally different. In a real emergency people don't want to have to wait a few weeks until information reaches them, they want it immediately. What we ended up with was AM radio coverage, because they of course don't have their transmitter sites in Manhattan. This discussion really get to me. I don't know what your location is and it isn't all that important, but as a New Yorker and someone who actually lived through the event, working in the broadcast industry that day and living with the results of the destruction, it always strikes me as interesting when I read comments from those who live elsewhere or weren't there when they use terms like, When "WE" were attacked. While I appreciate the emotion of fellow Americans, it was the people of DC, Pennsylvania (and a rural area at that) and NYC who were attacked. Whether the systems failed due to technology or choice, they failed and when you can't get a call through you don't give a damn what the reason is. When we experienced a power outage a few years ago in the North East, ecven though television broadcasters remained operational, most people who didn't have power didn't own battery operated televisions! With no powe,r we had no internet and no cell service for the majority of the region once battery backups died. I live here and I know!