The way it was explained to me is that the when you are picked up on camera, a program "measures" you for height, girth, and hairtype. It also checks for "protusions" from the chest area.:biggrin: It's not 100% but very close, and gives them a general count, though not precise.
Great. Now, I not only have to get oggled by the guys around me, but I'm getting oggled by the infrastructure too. I feel so safe.
As for the Bluetooth and GPS, a tech buddy explained that on my Moto Razr, if I turned the GPS off, the only way they could tell where I was is if I dialed 911. They would have to jump through extra hoops even to track me while I talk, except to see what tower zone I was in. If you turn it off completely it transmits and recieves nothing. Unless there is some kind of sneaky program that tracks non powered phones, that I'm not aware of.
Think on this... You're carrying a cell phone. Someone calls that cell number. That phone call wends its way through the terrestrial phone network to... where? Precisely? Which cell tower should field a phone call to your handset, to use industry lingo? Presumably your cellular provider has thousands if not hundreds of thousands across the continent. Which one are you closest to?
Perhaps a quick search algorithm starting at your home cell might be able to find you like a maitre'd walking through the lobby shouting "Call for 911 Headbanger!" in hopes that your handset will pipe up and say, "I'll take it standing in line at the Dippin' Dots!" Maybe start the search at the last cell with which your handset communicated for a call or text message, etc.
But no. That search would take too long for the calling party to hang on the line. The cell network demands to know precisely where all its handsets are at all times, and the handsets, like dutiful little brownshirts, check in constantly to gaurantee this.
Even while "off", your handset is sending out little status reports, "1911 Headbanger is here." "Now, 1911 Headbanger is here." Any cells that actually hear the RF broadcast from your handset categorize the signal strength and then communicate with every adjacent cell site to see who has you at the strongest signal strength, which cellsite to which center you're closest.
That cell tower wins the election and become responsible for all of your handset's traffic, to and from. This happens constantly, over and over. Your "off" handset is like a personal RF tracking device tattling on you everywhere you go. Cell sites themselves can get bored and occasionally send out "Who goes there?" signals to get all handsets within RF range of the cell to systematicly report in.
Regardless, the cell network knows where you are all the time, whether you have your phone turned on or off. The only way to prevent your phone from tattling is to pull the battery entirely and render the device as a whole electricly inert. When you slap a charged battery back in, it'll do the, "Handset 1911 Headbanger, reporting for duty! What are my orders, sir?" thing immediately with the nearest cell site, without even waiting for you to turn it "on", and you'll be able to get your calls again and read any waiting texts or listen to any waiting voice mails.
I don't trust tinfoil hat-like aluminum foil pouches, wallets, or bags to not, at some point, break down, allow a signal in, or more importantly out. I'd far prefer a slim pouch that would accept the handset, but only with the battery removed, and have a separate pouch for the removed battery.
That's the cellular/GPS/Bluetooth/self-tracking device security measure I would actually BUY. Otherwise, the phone comes in two parts. My pants have two pockets, one on each side. Funny how that works out.