Green party politician Malte Spitz sued to have German telecoms giant Deutsche Telekom hand over six months of his phone data that he then made available to ZEIT ONLINE. We combined this geolocation data with information relating to his life as a politician, such as Twitter feeds, blog entries and websites, all of which is all freely available on the internet.
What does this interactive tool show? More than you probably thought would be possible with such limited data. Simple things like meetings, flights and other travel, and places he frequented are easily parsed. You can also highlight when he was in the same areas throughout the time period covered.
A great deal of this information is quite boring and repetitive (much like anyone's life), but I imagine it would be very valuable for intelligence agencies and law enforcement. Cross-referencing with phone data from other individuals could probably tell you who was in attendance at the same functions, at the very least.