[size=+1]How signal locates you
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When your cell phone is switched on, your network provider knows exactly where you are within 300 YARDS or less.
When you make a call with your cell phone, its message is picked up by one of the aerials operated by service providers. But even when you are not making a call, your phone is sending out a regular "check" signal. In major cities you will be within range of several phone masts. Computers can compare the signal strength emitted by your phone and the tiny time lags at each aerial, giving the operator several accurate readings. By intersecting the readings from at least three masts, it can be calculated where your cell phone is at any given time.
This info was provided by this url below in regards to the Imette St. Guillen case.
New York Daily News:
Writers: ALISON GENDAR and ADAM LISBERG
http://www.nydailynews.com/front/story/399892p-338804c.html
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When your cell phone is switched on, your network provider knows exactly where you are within 300 YARDS or less.
When you make a call with your cell phone, its message is picked up by one of the aerials operated by service providers. But even when you are not making a call, your phone is sending out a regular "check" signal. In major cities you will be within range of several phone masts. Computers can compare the signal strength emitted by your phone and the tiny time lags at each aerial, giving the operator several accurate readings. By intersecting the readings from at least three masts, it can be calculated where your cell phone is at any given time.
This info was provided by this url below in regards to the Imette St. Guillen case.
New York Daily News:
Writers: ALISON GENDAR and ADAM LISBERG
http://www.nydailynews.com/front/story/399892p-338804c.html
