[peterjmag]

For those who haven't seen it, here's a great illustration of what that data looked like for one person back in 2009:

http://www.zeit.de/datenschutz/malte-spitz-data-retention

I can imagine that it's only gotten more granular and comprehensive since then.

[KGIII]

That site makes me happier about being able to seldom carry my phone. I don't leave it home for privacy reasons, but that's a nice side benefit.