http://www.businessinsider.com/securus-prison-technology-location-tracking-hacked2018-5
origin - https://www.pipiscrew.com/2018/05/a-prison-technology-company-has-a-way-to-track-almost-any-cell-phone-in-the-united-states-got-hacked-as-well/ a-prison-technology-company-has-a-way-to-track-almost-any-cell-phone-in-the-united-states-got-hacked-as-well