AT&T told USA Today the changes generally were due to the pending merger with Bell South and a planned video service this summer.
AT&T had been accused in a lawsuit of improperly sharing records to aid the federal government's counterterrorism efforts.
Sprint and Verizon say they have no plans to modify privacy policies adopted in 2005.
Jordana Brewster on Paul Walker: 'He was an enormous presence in my life'
Exploding whale video goes viral on Internet