Here's an example of how a government agency could get indirect access to phone data...
Amdocs (http://en.wikipedia.org/wiki/Amdocs) provides billing services and customer support for most of the major phone companies so it has access to all of the transactional data on your billing statement. If a government agency had access to the Amdocs data, it would have access to the phone data through an indirect channel.
Amdocs (http://en.wikipedia.org/wiki/Amdocs) provides billing services and customer support for most of the major phone companies so it has access to all of the transactional data on your billing statement. If a government agency had access to the Amdocs data, it would have access to the phone data through an indirect channel.