What is the effect of this kind of mobile phone signal jammer? The reporter had a bargain to buy a portable Florida Teacher Uses Cell Phone Jammer with the smallest coverage at a price of 120 yuan. This mobile phone jammer is similar in size to a general candy bar phone on the market, but is about twice as thick as a mobile phone. The full metal shell, with 3 antennas on the top, can respectively interfere with the signals of China Mobile, China Unicom, PHS, and even the recent 3G mobile phones. The instrument claims to be able to shield various cell phone signals within a radius of two meters. So I found 4 mobile phones of different brands and different operators to do experiments. When the reporter presses the switch of the mobile phone signal jammer, the top of it lights up with a green light. After about 30 seconds, the screens of these 4 mobile phones show no signal, and the call cannot be made, even "110", "120", and " 119" These emergency numbers are not working. cell phone jammer If you use a fixed phone to call a mobile phone in the shielded area, it shows that it is temporarily unavailable.
When the reporter took out the mobile phone two meters away, after a few seconds, the signal of the mobile phone was restored, and the calls were normal. Subsequently, the reporter also took the device to a car equipped with a GPS anti-theft device for experimentation, and the test results shocked the car owner. Since the GPS anti-theft devices currently on the market actually communicate with the monitoring center through mobile communication signals, when this device is opened and placed in the car, the GPS is "blind." At that time, the reporter parked the car on the side of the road, opened the Florida Teacher Uses Cell Phone Jammer device and placed it in the car. When he got out of the car and dialed the phone of the GPS company's main station to ask for the vehicle location, the other party still said that it could not locate the vehicle after 3 minutes of hard work.
