The nation's fourth-largest carrier by subscriber base disclosed in its transparency report on Wednesday that it had fielded 177,549 criminal and civil subpeonas, 17,316 warrants and more than 3,000 wiretap orders.
It marked the first time T-Mobile issued a transparency report, which have become increasingly popular over the past year as civil liberties groups, shareholder and consumer advocates have pressured companies to be more open about when they disclose customer information. T-Mobile was the last of the four national carriers to issue a report, which comes amid continued scrutiny of surveillance programs run by the US National Security Agency -- including the bulk collection of phone call data -- that were revealed when former NSA contractor Edward Snowden leaked classified government documents.
The requests kept T-Mobile busy last year -- the number of requests jumped nearly 11 percent from 2013.
Read more: T-Mobile was asked to turn over more customer info than its larger rivals - CNET