It doesn't require much paperwork in the United States. The mobile phone providers have built convenient portals for law enforcement, they just plug in your pho

It doesn't require much paperwork in the United States. The mobile phone providers have built convenient portals for law enforcement, they just plug in your phone number and get your location history from the day you opened your account to right now. Sources: https://www.schneier.com/blog/archives/2009/12/sprint_provides.html https://www.schneier.com/blog/archives/2009/12/sprint_provid... https://www.businessinsider.com/att-project-hemisphere-016-10 https://www.businessinsider.com/att-project-hemisphere-016-1...