"Mobile communications can easily be surveilled. One step you
can take to prevent tracking is to install Tor on your phone.
"Orbot, developed by the Guardian Project, is an application
that implements Tor on Android phones. It allows mobile phone users
to access the web, instant messaging, and email without being
monitored or blocked by their mobile internet service provider.
Learn more about Tor at https://torproject.org or visit our how-to
guide for using Tor on your computer.
"Don't have an Android device? Your best bet is to try to browse
the mobile web with HTTPS. Many smartphone browsers these days
support this type of browsing. Using HTTPS means that you are
creating a more secure channel over an unsecure network, better
protecting you from surveillance and eavesdropping. It prevents
someone from accessing your web accounts without permission.
Remember, though, HTTPS encrypts the transmission, but NOT the
content you are transmitting."