Radio Frequency (RF) Jammers
The Basics of Cell Phone Jamming
Cell phones work by communicating with a service network through the utilization of cellular towers or base stations. Individual towers partition cities into small sections called cells. As a cell phone user traverses the cells in an area, the signal is passed from tower to tower.
Jamming devices take advantage of this fact by transmitting on the spectrum of radio frequencies used by cellular devices. Through its concurrent transmission, the jamming device is able to disrupt the two-communication between the phone and the base station. This form of a denial-of-service attack inhibits all cellular communication within range of the device.