Amazon.com: Logixtar OBDII GPS Tracker Vehicle, 4G LTE Real-Time GPS, only $9.99 Monthly or $79.99 Annually, Get alerts, History Playback, Cancel and renew subscription Anytime, Free iOS and Android App.
Google Earth 5.2 Gets More GPS-Friendly | Modern Hiker
Virginia police routinely use secret GPS pings to track people's cell phones - Virginia Mercury
Phones vulnerable to location tracking even when GPS services off
How to Track a Cell Phone Location using google phone locator