The Electronic Frontier Foundation (EFF) ( is a wonderful resource for privacy-related issues and concerns. I check its website frequently to make sure I am aware of the latest issues and concerns around privacy. On May 6, 2021, EFF posted a blog that is relevant to my experience when I give training to employees about data privacy and security—people are unaware how their information is being tracked through their phone.

In EFF’s blog post, it launches a new breakdown of mobile phones that is “an online guide to defending yourself and your friends from surveillance by using secure technology and developing practices. This guided tour walks through the ways our phone communicates with the world, how your phone is tracked, and how that tracking data can be analyzed.”

The guide is designed “to give the reader a bird’s-eye view of how that rectangle in your hand works, take away the mystery behind specific privacy and security threats, and empower you with information you can use to protect yourself.”

Even the most savvy users may wish to check it out as a refresher.