Protect Phone Privacy & Security During a Protest -Police can use digital surveillance to track anyone, Consumer Reports

Turn Off GPS, WiFi, and Bluetooth

You probably know your phone's GPS or Location Services features can help app makers and other companies track your movements. But Bluetooth and WiFi signals can track your location as well—private companies do it all the time to collect and share consumer information for advertisingSome phones may switch Bluetooth, WiFi and other settings back on automatically after a time, a feature intended to help keep your phone connected to your other devices. You may want to check periodically if you’re keeping your phone on during a demonstration.