A cell phone jammer is just the same as interrupting other communication device such as in the case of a radio. Cell phones are used for communication and you can contact the person through a station or satellite, it is where you get signal. Cell phone jammer device can transmit on the frequency in communication, thus it disrupts communication between your sell phone and the cell phone signal you are calling to. When a cell phone jammer ad hit on the phone signal it is called attack on the communication service. The cell phone jammer denies any signal from the other phone you are calling.
A cell phone jammer comes in a high frequency that it is able to cancel the signal form two cell phones. Any cell phones are designed to have a hidden power to be able to use when in case you are in a very remote areas where signal is very hard to get, you just press # and 0 and then press send and your phone will have added signal, but even this added signal can be jammed be interfered using a cell phone jammer.
Cell phones also use two frequency, one for listening and one for talking. In some cases when you use cell phone jammer, only one frequency is being haltered. It's the reason that sometimes you can hear the other line but he or she cannot hear you or you can hear him talking but he cannot hear you.
High caliber cell phone jammer can halt both frequencies that mean that you cannot get any signal from the other line. If you want to use a cell phone jammer there is only one device that you need and it is a frequency device. It is natural that cell phones uses different kinds of signals but one thing for sure is that all phones uses radio signal and this signal can be altered using a cell phone jammer. The actual degree of interruption of a cell phone jammer depends upon the locality and the strength of the signal. It can interrupt two frequencies or just one frequency. Find more at signaljammerstore.