Portable Cell Phone Jammers
GSM is the most commonly used frequency range for cell phone networks and mobile communications. It includes four main bands (850 MHz, 900 MHz, 1800 MHz, 1900 MHz) and many smaller standards used in different countries of the world (for example, UMTS, CDMA2000, Nextel, TDMA, AMPS, W-CDMA PCS etc.). Among communication standards 3G must be mentioned separately because it is not only a modern communication frequency but it can also be used with other purposes. Unfortunately, both GSM and 3G frequency bands are used not only to make your life much easier and more interesting, but with bad intentions as well. To jam GSM or 3G frequencies you can choose a portable or a desktop GSM jammer. The difference between these two types of GSM jammers is that the portable 3G jammers are operating in radius up to 15 meters, while the jamming radius of desktop 3G GSM CDMA jammers can be up to 200 meters
Not many people know that GSM frequency may be used by law enforcement agencies with many surveillance purposes. For example, they can get the private data from your cell phone with the help of mobile phone carrier. While they supposed to obtain a warrant for such procedure in fact they often do not do that, violating your privacy expectations in that way. Moreover, some law enforcements may wiretap your cell phone for eavesdropping of all your conversations. In this case you will definitely need a GSM blocker to block gsm signal. Yet those are not the only problems you might have.
These days technology of cell phone tower triangulation is quickly spreading across mobile gadgets and tracking devices. This technology allows any tracking device to use three cell phone towers located closest to you to calculate your coordinates at the crossing of their working ranges. So law enforcement agencies can use this technology to find out where you are even if you have no GPS module in your smartphone or if they have not placed GPS tracking device under your car.
3G frequency can also pose a threat to your wireless security. With its help some hidden cameras stream video; people are getting access to the wireless internet in places, where according to security policies should be no wireless networks at all, and your smartphone might be probed in a manner like Trojan viruses probe PCs. So you can use devices from this category to protect yourself from all those threats.
We hope that you are aware that cell phone tower triangulation is not the same thing as GPS tracking thus if you need to deal with standard location tracking system you might want to visit the GPS Jammers category.