Cell Phone Signal Jammer DIY For 3G 4G

Mobile phones are now widely used, and normal frequencies and common frequencies include GSM, CDMA, DCS and PCS. Mobile phone communication frequencies allow people around the world to communicate with each other more easily. At the same time, a series of problems caused by the popularization of mobile phones, such as mobile phone harassment, mobile phone ringtones and mobile phone security problems, are everywhere. In this case, 4G LTE jammers can help solve many problems.

Banned mobile phones has been a hold on the balance of payments as well as national and local correctional institutions of public security and public safety. Some one can eavesdrop your conversations by intercepting your phone signal blocker.And they can also track you through signal tower triangulation. This classification of jammers is powerful that jamming GSM 3G 4G frequency be disturbed, also jamming GPS or WiFi. We provide so many frequency jammers, the multiple frequency portable jammer adjustable designed more popular.If you need to protect your location privacy or anti tracking, you can buy a jamming device against GPS tracking from GPS jammer category.

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    Portable Armband Hidden GSM 3G 4G GPS Blocker or WiFi Jammer

    The signal jammer has a wide range of interference frequencies, can block all mobile phone signal CDMA / GSM, DCS, 3G, 4G LTE, 4G Wimax, the GPS or WiFi blocked depend on your choice. Easy carry and hidden,can be carried on the arm,jamming radius up 20 meters.

5 Bands Portable GPS WIFI Wireless jammer

    Portable Mobile Phone GSM 3G 4G GPS WIFI Wireless Video Jammers

    5 antennas signal jammer is the most popular portable small jammer. It blocks almost all phone frequencies. It jamming bluetooth, WIFI, GPS and wireless video signals.

    Hot seller handheld golden shell vehicle cell phone blocker jammers  jamming GSM 3G 4G, WIFI bluetooth  GPS and wireless video signals. We provide a variety of jamming signal frequency band combination. When it is turned on, all phones within a radius of 20 meters will not work properly.

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    Handheld GPS WIFI GSM 3G 4G LTE Mobile Phone Frequency Jammer

    Portable mobile phone signal jammer block GSM,3G,4G,GPS,WiFI.Handheld design convenient your outdoor use.The maximum jamming radius up 20 meters. 6 antennas and an excellent design make it perhaps the most popular mobile jamming device in the world.

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    Desktop GSM 3G 4G Jammer Block GPS WiFi UHF VHF Signal Adjustable

    6 bands desktop high power jammer with three jamming combination GSM+3G+4G, GSM+3G+GPS+WiFi, GSM+3G+UHF+VHF for you to choose.According to the signal intensity in a given area block radius can be up to 50 meters.It may be the most popular desktop blocker in the office or home.

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    Portable GSM 3G Mobile Jammer Blocking GPS WIFI Remote Frequency

    The handheld signal blocker with 4 bands can jam GPS GSM 3G signal at the same time. Car charger provide for you convenient use anywhere in the vehicle.Up 15 meters radius is enough to keep your privacy safe.

    This portable jammer is very popular nowadays. Jamming with GSM 3G , GPS, WiFi . It has the characteristics of light weight and small volume. Interfere radius up 15 meters.

    This gsm signal blocker interfere with GSM 3G GPS WiFi 315 433 868 depends on your needs, small and portable features. Maximum jamming radius of 15 meters,car charger is standard.

    Handheld mobile jammer can block GSM 3G mobile cellular signal, remote control frequency 433MHz 315MHz 868MHz , WiFi and GPS.The black shell and portable design make it easy to hidden and use.The maximum jamming distance up 15 meters,best tool for you to protect privacy.

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    5 Bands Desktop High Power Cell Phone WiFi Signal Jammer Adjustable

    The wireless jammer can block 3G 4G CDMA GSM DCS PHS WIFI signals.With high heat dissipation, the wireless signal jammer can work for a long time continuously.The desktop is not bulky and can be used anywhere.Therefore, it is one of the most popular desktop signal jammers.

    This desktop adjustable phone blockers has delicate shapes with 5 bands suitable for office,home. Jamming 3G 4G CDMA GSM DCS PHS WIFI. With good heat dissipation system can ensure work for a long time.

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    Waterproof Mobile Phone Signal Jammer WIFI Wall Type For School

    The ultra powerful waterproof phone signal jammers jamming range wide, radius up to 100 meters, can be hung on the wall, specially designed for big occasions, in schools, prisons, courts, factories and other places have a wide range of applications.




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Cell phone jammer block all communication between phones by cutting off their radio transmissions and preventing them from connecting to the Internet. Simply turn it on, it will immediately start blocking the types of CDMA, GSM, DCS, and 3G 4G signals. All nearby phones will show "no service" and you can perform demonstrations, meetings, or other important activities without being interrupted by the sound of a bell or vibrator. When the scrambler is turned off, all phones will automatically restore their network connections.

Why do gas stations need cell jammers?

When the phone's battery starts up and the bell rings, a satisfying energy spark that causes a slight spark may cause a fire. Gas stations have a clear ban on cell phones, and petrol stations have a clear ban on phone calls. Gas station equipment is controlled by computer, mobile phone signal affects the normal operation of equipment, causes the banning of measurement, more important is that mobile phone in the process of call can present a spark, vulnerable to fire, gas station blasting. Installing cellphone interceptors at gas stations could prevent some tragedies. Therefore, it is not only prohibited to use mobile phones in the station, but also best not to use mobile phones within two or three meters around the gas station.

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