hit counter

Covert Mobile Phone Jammer

1 Star2 Stars3 Stars4 Stars5 Stars (34 votes, average: 3.53 out of 5)
Hand Held Cellular Jammer

Sticking with the mobile phone theme, here’s a cellular phone (or mobile phone) radio signal jammer, designed to knock out phones in a 15 metre radius. The unit features a rechargeable battery and will run for 90 minutes on a single charge.

The jammer has 3 aerials to match the 3 frequency bands it’s designed to block out. If an aerial does not match the wavelength (and thus frequency) of the transmitted radio signal, then the strength of the signal can be severely limited. Therefore to maximise the output of the device, the jammer has an aerial length that matches the average frequency of the major frequency bands.

The jammer is intended to block out the following frequencies:

  • 851 - 960Mhz
  • 1805 - 1990Mhz.
  • 2100 - 2170Mhz

However, if you look at the commonly used frequencies on the GSM frequency band allocation:

  • GSM900 -> 880 - 915 MHz paired with 925 - 960 MHz
  • GSM1800 -> 1710 - 1785 MHz paired with 1805 - 1880 MHz
  • GSM1900 -> 1850 - 1910 MHz paired with 1930 - 1990 MHz

GSM900 and GSM1800 are typically used in Europe, and GSM1900 is typically used in the US. You’ll notice that GSM1800 is not completely knocked out. The 1st set of frequencies on GSM1800 do not fall within the specified range on the jammer. However, GSM900 and GSM1900 are completely covered by the jammer. I wonder if the jammer does completely knock out service providers using GSM1800?

However, it’s illegal to own and use a frequency jammer in Europe, and some parts of the US too I imagine. You’ll notice that Spy Catcher will not sell a jammer to anyone in Europe. Considering they are based in the UK, I wonder if they stock the devices in the UK. Remember, it’s illegal to own one!

Top 5 Related Posts:

Check out the Spy Review Archives for all previous spy gadget articles!

Did you like this article? Want to find out more?
Or do you want to bookmark this article?
This article was posted on Friday, April 13th, 2007 at 10:05 am in Counter-Surveillance.
 

14 Responses to “Covert Mobile Phone Jammer”

  1. spy3k Says:

    Here they talk about a cool one:

    radius 50km!!!

    http://gizmodo.com/gadgets/rj_g1575/

  2. Dan Says:

    50km? Yeah right… for such a small device I doubt it will manage 5km!

  3. Andi Says:

    Who cares about 5km radius? This claims to work within a few feet or more, and would be just fine with me: http://www.techgadgetz.com/cjama.htm. It is also small, portable, and rechargeable…… Plus, I think it isn’t illegal to own these, just to use them in certain places.

  4. Dan Says:

    Definitely illegal to own. Just harder to detect :)

  5. kerravon Says:

    I bought a cell phone jammer from http://www.infostream.biz
    fantastic gadget!!! I carry it with me to cinema, restaurant and on the train, I enjoy it so much.

  6. Dan Says:

    Looks like an advertising post there…. but it is relevant, so I’ll leave it. :)

  7. RHARRISON Says:

    I am looking for something cheap and that will stop other people from useing any spy equipment near me

  8. Dan Says:

    It’s almost impossible to get something that will stop all spy devices unless you end up living in a box. If you’re really concerned, you should probably speak to a counter-surveillance agency to sweep your home and workplace.

  9. Dan Says:

    It’s illegal to own one in the UK. :)

  10. Simon Farnsworth Says:

    Technically, it should block GSM 1800. GSM and UMTS use paired frequency bands; one band is for phone to base station communication, and the other is for base station to phone communication. So long as you block one band in the pair, the phone will stop working (it needs two-way communications to function, not one-way).

  11. Sssh! The Mobile Phone Detection Unit » Spy Review Says:

    […] in certain offices, in theatres, you get the idea. You could block the phone signals using a phone jammer device, but phone jammers are illegal in most countries in the EU and some US states. So how do you solve […]

  12. Find Cellular Phone Says:

    Cellular Phone Deals Online – Best Way To Save…

    Determining the best cellular phone is not so easy anymore. There are lots of choices to make. What kind of cellular phone will be best for you? Want a mobile with a high resolution camera? Looking for a cellular phone with an MP3 player and Java games…

  13. The Flowfield Unity » Archive » Pipe dreams Says:

    […] but perhaps that can be circumvented with the use of anti-teleportation zones, like you can do with mobile phones… That should cover prisons, banks and such, but then there’s the whole issue of […]

  14. Transplant Comics » Pipe dreams Says:

    […] but perhaps that can be circumvented with the use of anti-teleportation zones, like you can do with mobile phones… That should cover prisons, banks and such, but then there’s the whole issue of […]

Leave a Reply