Do you know how long mobile phone service providers keep records about which cell tower you used? Or, text messages? Or, call detail records? Wired took a look at a photo copy of a U.S. Department of Justice summary table titled “Retention Periods of Major Cellular Service Providers” that provides the specifics.
Which Telecoms Store Your Data the Longest? Secret Memo Tells All
Some key differences between mobile phone service providers are:
Text Message Detail: While Sprint, T-Mobile and Verizon keeps this information for 1 or 2 years. AT&T keeps it for between 5 and 7 years for post-paid customers.
Text Message Content: AT&T, Sprint and T-Mobile do not keep this informantion. However, Verizon keeps it for 3 to 5 days.
Call Detail Records: Sprint, T-Mobile and Verizon keeps this information for 1 to 2 years. AT&T, on the other hand, retains it for 5 to 7 years.