Researchers from Princeton University have developed an app called PinME to locate and track smartphone without using GPS. The application mines information stored on smartphones that dont require permissions for access. The data is processed alongside with public available maps and weather reports resulting on information if a person is traveling by foot, car, train or airplane and their travel route. The applications for intelligence and law enforcement agencies to solve crimes like kidnapping, missing people and terrorism are very significant. The researchers hope to be fomenting the development of security measures to switch off sensor data.”]
Source: http://securityaffairs.co/wordpress/68800/hacking/pinme-track-smartphones.html