Smartphones are useful tools for everyday life, but they're privy to nearly everything about you, including all the places ...

How to Block the Ultrasonic Signals You Didn't Know Were Tracking You An emerging tracking technique uses inaudible sounds to communicate with apps on your phone and track you. Here's how to stop it.

How to Block the GPS on Your Android. In this age of diminishing privacy, some users are taking a stand against Big Brother. Many mobile phones, including devices running the Android OS, have GPS ...

Detectnu’s device not only block GPS signals within a 50-meter (164-foot) radius, but also GSM cellphone signals in a 20-meter (65-foot) radius.