People view their cell phones as their personal object, something to which no one has access to except them. That is not exactly the case. Scientists who were conducting a study followed 100,000 cell phone holders outside of the USA with tracking devices in their phones. They found that two thirds of the people did not go too far away from their homes. Overall, most of them stayed in within a twenty mile range of their homes for half a year. More exact details regarding the research are not known at this time.