In the first public accounting of its kind, cellphone carriers reported that they responded to a daunting 1.3 million demands for subscriber data last year from law enforcement agencies seeking text messages, caller locations and other information in the course of investigations.
One stinging statistic: AT&T gets 230 requests for data per hour, and turns down only 18 per week. Sprint gets 500,000 requests per year. While many requests are backed by court orders, most are not. Some include "dumps" of tower data, which captures everyone near by at a certain time."