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How To Build A Cell Phone Scrambler Free

When the mobile phone communicates with the base station, How To Build A Cell Phone Scrambler Free is like a troublemaker, deliberately making noise around you. The noise signal is so big that the mobile phone can't understand what the base station is saying, and the base station can't hear what the mobile phone is saying. In fact, this is not to shield the mobile phone signal, but to obliterate the signal sent by the mobile phone in a large number of noise signals, so as to achieve the purpose of interference. At present, the mobile phone signal jammers used in the examination room are all full frequency bands, which can interfere with all the frequency bands of the three operators 2G/3G/4G/5G, and WIFI signals and Bluetooth signals can also be shielded. The above is the principle of mobile phone jammer. However, the frequency range of electromagnetic waves ranges from several Hz to several hundreds of GHz, and each segment may be used as a communication signal. Will there be some special frequency bands that are used in the examination room? cell phone jammer

Mini Type Portable Signal Blocker GSM 3G WiFi GPS Dev...

How To Build A Cell Phone Scrambler Free

This is a mini portable hidden type multi - purpose smartphone signal blocker. First of all, the design of this device is very portable. The size of 20mm*20mm*26mm can be easily put into pocket or backpack. Second, the device has a very strong concea...

$179.99$320.2

Hidden Type Photo Frame Style Signal Jammer Device CD...

How To Build A Cell Phone Scrambler Free

This cheap cell phone jammer using a new photo-frame design, has a very high hidden performance. Able to jamming all cell phone signals, allowing you to enjoy a quiet moment. Output power of each band can be adjusted by knob and jamming range can be ...

$948.49$1436.13

Desktop 16 Antennas WIFI GPS LOJACK UHF VHF 2G 4G 3G ...

How To Build A Cell Phone Scrambler Free

The world's first powerful all-in-one mobile phone 5G / 4G / 3G / 2G WIFI GPS LOJACK UHF VHF signal jammer, with 16 indoor antennas, adjustable 100W output power, interference up to 80m...

$1299.99$2533.46

Desktop 6 Bands Adjustable Power Blocker Device GSM/3...

How To Build A Cell Phone Scrambler Free

This jammer device can jamming all cell phone signals such as 2G, 3G , 4G. Except for cell phone signals, it can also jamming WiFi and PHS signals. The device is available in classrooms, libraries, cinemas, offices and other places where cell phone s...

$287.53$550.98

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