Since the noise of your own vehicle or the car in the lane next door will naturally interfere with the comfortable chat on the steering wheel, turn the speaker up to stop. But this is a noisy agitation, especially from cars waiting for traffic lights. So far, Homemade Cell Phone Jammer Pdf only a tuned car with a bass music station in the trunk can beat it. Some parents may think that children need to use a mobile phone to cope with possible emergencies Dangerous situation. But how can schools make people feel at ease using mobile phones? A principal in Philadelphia recently tried to explain to a parent that their school just took mobile phones from children who would not stop using them and kept them for several weeks. The parents were not impressed. Some people believe that if children are taught not to use mobile phones in class, all they need to do is teach them to respect them. But when they see their parents using them for dinner, walking on the street, or even driving, what do the children think? cell phone jammer The college entrance examination is almost one of the most important things in Chinese people’s lives. Ensuring its fairness has become an important task of the local education bureaus. In order to ensure fairness, the college entrance examination venues will adopt various anti-cheating measures, such as metal detectors and examiners. Check, fingerprint unlocking, etc., and the most common one is signal shielding.
As a mobile communication device, a mobile phone needs to establish a connection with a nearby base station when communicating, and then access the core network to find the communication destination. All information is carried and transmitted through electromagnetic waves. The electromagnetic wave frequency band used by the mobile phone is related to the system used by the mobile phone and the operator where it is located. But in general, the electromagnetic wave frequency bands used by the three operators are distributed in the range of 850-4900MHz. If the college entrance examination organizer wants to use Homemade Cell Phone Jammer Pdf to shield the mobile phone signal in the examination room, it is impossible to make the 2G/3G/4G/5G base station near the examination room not work, otherwise all the communication equipment in this area will not be able to communicate normally. Then the only way is to shield the mobile phone signal in the examination room. When it comes to shielding mobile phone signals, the first thing that comes to mind is metal shielding, that is, placing the mobile phone in a closed metal box.
