Your Phone is Divulging More Information Than You Think
It is no secret that the NSA is, or is at least capable of, tracking your every move. Many people also realize that advertisers have a lot more access to tracking you than you’d think (or like), but most people do not.
Your phone is constantly connected to cellular towers, scanning for WiFi, and in some cases searching for Bluetooth. To make wireless connections, a handshake of sorts has to take place. This handshake includes some indentifiers to tell the source who you are. This information isn’t your name or email address, but a MAC address is unique enough to pretty easily trace you as an individual.