One Way to Prevent Police From Surveilling Your Phone

You can add a PIN code to your phone’s SIM card in order to prevent police from cloning it.

Cellphone data spying: It's not just the NSA

Geofence warrants: How police can use protesters' phones against them - CNET

New app could help stop violence at traffic stops, inventors say – Daily News

Protesting Tips: What to Bring, How to Act, How to Stay Safe

Secretive White House Surveillance Program Gives Cops Access to Trillions of US Phone Records

3 Ways to Check if You Are Under Surveillance - wikiHow

Mobile Spyware: Identification, Removal, and Prevention - TechSafety

5 ways to secure your cell phone from the police

How Protestors Can Protect Cell Phone Data From Police

How to Block Neighbors Security Camera - Useful Tips- ZOSI

Inside Fog Data Science, the Secretive Company Selling Mass Surveillance to Local Police