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The study tracked the mobile phone use and movements of 100,000 people over a six-month period.

The participants were selected from a pool of six million mobile phone users in an undisclosed country.

Each time a call was made or received, or a text message recorded, investigators noted the location of the relay tower servicing the mobile phone. They also recorded calls to two locations most frequently used by the mobile phone user.

Researchers found the calls were usually made to and from home and work within a five-kilometer radius or area around the tower.

Using the same model, they could also tell what percentage of calls were made from a distant location.

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Mobile Phone Records Show People Rarely Stray From Familiar Areas

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