Cellphone Carriers Keep Personal Data Up to 7 Years Report Says

A document obtained by the ACLU shows for the first time how the four largest cellphone companies in the U.S. treat data about their subscribers' calls, text messages, Web surfing and approximate locations.

Source:
http://www.foxnews.com/scitech/2011/09/30/cellphone-carriers-keep-personal-data-up-to-7-years-report-says/