IF YOU PURCHASED A NEW CELLPHONE over the past 18 months or so,
odds are that one of the features listed in small print on the side of
the box was "E911 capable." Or, as in the case of my latest Motorola,
"Location technology for piece [sic] of mind." Perhaps you asked the
salesman to explain the feature, and he replied that it means that cops
can home in on your phone in case of an emergency, a potentially
important perk should you ever find your hand pinned beneath an
immovable boulder in rural Utah, as Aron Ralston did recently. Assuming
he could have gotten a signal, an E911-capable phone might have saved
the young backpacker the pain of having to amputate his own arm.
What your salesman probably failed to tell you-and may not even
realize-is that an E911-capable phone can give your wireless carrier
continual updates on your location. The phone is embedded with a Global
Positioning System chip, which can calculate your coordinates to within
a few yards by receiving signals from satellites. GPS technology gave
U.S. military commanders a vital edge during Gulf War II, and sailors
and pilots depend on it as well. In the E911-capable phone, the GPS
chip does not wait until it senses danger, springing to life when
catastrophe strikes; it's switched on whenever your handset is powered
up and is always ready to transmit your location data back to a
wireless carrier's computers. Verizon or T-Mobile can figure out which
manicurist you visit just as easily as they can pinpoint a stranded
motorist on Highway 59.
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