Talk:Mobile phone jammer

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Is there anyway around cell phone jammers?

Thats what everyone really wants to know. It should really be on this page.
There are ways to get passed a cellphone jammer. As mentioned in Burn Notice if you extend your attena "Make one out of a wire" then you can beat the cellphone jammer with a better connection. Isnt exactly the most mobile but it will work. — Preceding unsigned comment added by (talk) 21:27, 26 August 2012 (UTC)

querries on the cell phone jammer[edit]

cell phone jammerz A cell phone jammer is an instrument used to prevent cellular phones from receiving and transmitting the mobile signals to a base station. When used, the jammer effectively disables cellular phones in the area. These devices can be used in practically any location, but are found primarily in locales where a phone call would be particularly disruptive. These include churches, mosques, libraries, movie theaters, meeting rooms, and other places where silence is expected.

History Cell phone jamming devices were originally developed for law enforcement and the military to interrupt communications by criminals and terrorists. Some were also designed to foil the use of certain remotely detonated explosives. The civilian applications were apparent, so over time many companies originally contracted to design jammers for government use switched over to sell these devices to private entities. Since then, there as been a slow but steady increase in their purchase and use especially in major metropolitan areas.

Operation Jammers block cell phone use by sending out radio waves along the same frequencies that cellular phones use. This causes enough interference with the communication of cell phones and the towers to render the phones unusable. On most retail phones, the network would simply appear out of range. Most cell phones use different bands to send and receive communications from towers. Thus jammers can work by either disrupting phone to tower frequencies or tower to phone frequencies. Smaller handheld models block all bands from 800mhz to 1900mhz within a 30 foot range. Small devices tend to use the former method, while larger more expensive models may interfere directly with the tower. The radius of cell phone jammers can range from a dozen feet for pocket models to kilometers for more dedicated units.

Older jammers sometimes were limited to working on phones using only analog or older digital mobile phone standards. Newer models such as the double and triple band jammers can block all widely used systems (AMPS, iDEN, GSM, et al) and are even very effective against newer phones which hop to different frequencies and systems when interfered with. As the dominant network technology and frequencies used for mobile phones vary worldwide, some work only in specific regions such as Europe or North America.

The power of the jammer's effect can vary widely based on factors such as proximity to towers, indoor and outdoor settings, presence of buildings and landscape, even temperature and humidity play a role.

There are concerns that crudely designed jammers may disrupt the functioning of medical devices such as pacemakers. However, like cell phones, most of the devices in common use operate at low enough power output (<1W) to avoid causing any problems.

Legality Owning, manufacturing, marketing, offering for sale or operating a cell phone jammer is punishable by an $11,000 fine and up to a year in prison for each offense.

Richard Welch, associate chief of the FCC's Enforcement Bureau has stated that the agency has never seized a single jammer or prosecuted an operator . "We haven't taken any actions because nobody has complained," Welch said, adding that it was possible jammer users were simply flying under the FCC's radar.

Concern has been raised over the need of cell phones in emergencies or by doctors. Those who condone their use argue that they have a right to moderate cell phone use on their own property.

Most countries, (with notable exceptions such as Israel) have similar prohibitions on jamming devices based on older broadcast laws.

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Naming of article and further search queries[edit]

I'm unsure of how this can be made, but in the search box typing 'mobile phone jammer' doesn't appear to work in linking to this article. Perhaps some re-directions of the search tool can be made, with other words leading to this page, but if that's not the correct terminology, disregard this subject. I have no idea in how this is done. Thanks, Aeryck89 16:25, 5 April 2007 (UTC)

The redirection has been created. --BorgQueen 16:32, 5 April 2007 (UTC)

legality of jam-proof cell phones in the United States[edit]

Part 15 of the FCC rules state that electronic devices must "must accept any interference received, including interference that may cause undesired operation." Does this mean that jam-proof cell phones are illegal? --Ixfd64 05:27, 1 July 2007 (UTC)

It's not really possible to build "jam-proof" cellphones, unless they broadcasted with a huge amount of power (enough to melt your brain, probably), since the principle behind jamming is that it creates so much bogus traffic that the real signal is lost in the noise. I suppose it could be possible to create a phone that can switch frequencies, but that would require huge modifications to the cellular infrastructure. Sloverlord 23:51, 6 September 2007 (UTC)
The only way to make a cell phone jam proof would be to change cellular technology to multi-band and frequency hop the signal. Even then, it's possible to increase the frequencies jammed to overcome frequency hopping. In short, at the end of the day, NOTHING is jam proof.Wzrd1 (talk) 19:15, 13 February 2012 (UTC)

Bottom line, cellphone jammers are completely illegal in the United States.KT445 (talk) 16:01, 25 June 2012 (UTC)KT445

Possible Contradiction?[edit]

The article states that cell phone jammers are illegal to own, import, and use in the United States. However, in the intro paragraph, it states that they are commonly used in places such as hospitals, libraries, places of worship, etc. Can someone clarify this? Zomic_13 18:56, 26 September 2007 (UTC)

In the article itself, it stated clearly that a waiver from the FCC is required to possess and operate a jammer. Whoever added that, thanks for clearing up confusion!Wzrd1 (talk) 19:17, 13 February 2012 (UTC)

Why aren't cellphone jammers used in prisons in the U.S.?[edit]

According to a current episode of Ted Koppel on the Discovery Channel, cell phones in prison are common contraband, used to tip off inmates to drug searches or communicate with the outside. Why aren't the cell phone calls jammed or intercepted effectively? 02:07, 8 October 2007 (UTC)

Because its not exactly a popular product. I would wager that the majority of people would have no idea these things exist, which makes us the smart ones ;). —Preceding unsigned comment added by (talk) 08:28, 27 January 2008 (UTC)
Prisons aren't small places, so they would require planning and multiple units/antennae, PLUS a waiver from the FCC, PLUS the equipment costs and the costs of planning by an RF engineer.Wzrd1 (talk) 19:19, 13 February 2012 (UTC)


why not use them in school exam halls? then the teachers don't have to do the tedious job of confiscating them. (talk) 16:29, 29 May 2008 (UTC) I use my cellular phone jammer in school.

Need link to source regarding legality of cell phone jammers in India[edit]

There is no link to any source that says about the legality of cell phone jammers in India(though there seems to be one at first sight). Can anyone please update?

Venki Subramanian (talk) 12:49, 13 August 2014 (UTC)