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Cell Phone Signal Jamming

The mobile phone is almost everywhere,but it brings us convenience at the same time, but also bring us many troubles. After all, not all mobile phone users know when to stop talking. At this time we need to use the cell phone jammer, to protect a quiet environment. For example, in churches, libraries and other places.

Imagine a noisy phone ringing next to you when you dine quietly. The phone rang when you were watching a great movie. At this time, maybe you need a cell phone signal jammer.

There are many legal purposes for using them in some peoples everyday lives. Cellular based security systems testing, cell phone testing, wireless product testing, and GPS product testing are areas where technicians use them all the time to verify their equipment is working without actually causing unnecessary calls to 911 centers. Many schools, theatres, movie shops, dorms, auditoriums, restaurants, and so forth can also use them legally.

There are many types of blocker cell phone to choose. Each jammer has its own special application range, your can choose products according to needs. If your have any questions, please contact us, we will quickly answer for your.

Featured Mobile Phone Jammer

How to choose your mobile jammer?

First, you need to know what types of mobile jammers are there. According to the interference frequency band classification: 2G , 3G , 4G cellphone signal jammer. According to appearance classification: Handheld telephone blocker, desktop cellphone blocker device, mini type mobile jammer, hidden cell phone blocker.

Second, you need to know what frequency band you want to blocker, how much volume is needed and how much range to blocker.

The main frequency bands used in the United States of America in communications are GSM850, GSM1900, 3G (850/1900 and 1700/2100) and 4G (Verizon USA 4G, Sprint Clearwire WiMAX and T-Mobile 4G)

If you know the above two points, then it will be easy to pick out the right jamming device for you.

About Cell Phone Signal Jammers

Cell phone jamming devices overpower the cell phone by transmitting a signal on the same frequency and at a high enough power that the two signals collide and cancel each other out. Cell phones are designed to add power if they experience low-level interference, so the jammer must recognize and match the power increase from the phone.

Cell phone jamming devices were originally developed for law enforcement and the military to interrupt communications by criminals and terrorists. The bombs that blew up commuter trains in Spain in March 2004, as well as blasts in Bali in October 2002 and Jakarta in August 2003, all relied on cell phones to trigger explosives. It has been widely reported that a cell-phone jammer thwarted an assassination attempt on Pakistani President Musharraf in December 2003. When President Bush visited London in November 2004, it was reported that British police considered using jammers to protect the president's motorcade through London.