Interesting to note here is that the ATT _gave_ those records "on its own", versus being subpoena via DEA by a judge, something that 99% of judges in their sound mind would have never ever ever agreed on, even in today's world.
I had a hard time believing that ATT would have done something like this out of their own free will, as they would have never done anything that could undermine their sales and bottom line (potentially) so severely.
I put "on its own" in quotes because knowing the way Government thugs are conducting themselves, most likely the ATT had been heavily blackmailed under the table this or another way and at some point they have given up (Wikipedia: tyranny). Don't be surprised if in couple of years from now the administration will change, and the management of ATT will change, and then you will see some tiny PR-lawsuit surfacing that yes indeed ATT were pushed by DEA and now they are "suing".