“The content of the conversation itself is not covered”.
Yeah, right.
In fact it probably wasn't covered, but only because the telecoms don't save that information because it is of no use to them. The metadata is very useful for billing, network performance measurment, social network analysis etc, but the content of the calls doesn't matter. Plus it is very expensive to store just the metadata - about 500 fields per call. Typically it's only stored for 90 - 120 days simply because of the volume and cost.