# Why do cellphones RETAIN so much information?

**URL:** <https://boards.straightdope.com/t/why-do-cellphones-retain-so-much-information/747420>\
**Category:** Factual Questions\
**Created:** [February 28, 2016, 7:46pm UTC](https://boards.straightdope.com/t/why-do-cellphones-retain-so-much-information/747420 "2016-02-28T19:46:32Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![usedtobe](https://avatars.discourse-cdn.com/v4/letter/u/ec9cab/32.png) [@usedtobe](https://boards.straightdope.com/u/usedtobe)\
**Post date:** [March 1, 2016, 8:34pm UTC](https://boards.straightdope.com/t/why-do-cellphones-retain-so-much-information/747420/21 "2016-03-01T20:34:06Z")

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From the [New York Times](http://www.nytimes.com/2016/02/29/business/media/see-that-billboard-it-may-see-you-too.html?_r=3&utm_source=fark&utm_medium=website&utm_content=link)

> [@](#):
>
> Clear Channel Outdoor Americas, which has tens of thousands of billboards across the United States, will announce on Monday that it has partnered with several companies, including AT&T, to track people’s travel patterns and behaviors through their mobile phones.

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