Old-fashioned analog phones are as sensitive to interference as today’s digital phones. It’s great to be able to call people at any time.Everyone next to them has to share such private conversations. Who hasn’t experienced it before? Although most people can only grumble and give up, some people go to extremes and retaliate.A mobile phone is essentially a handheld two-way radio communication device. Unfortunately, restaurants, cinemas, concert halls, shopping centers, and churches are all suffering from mobile phones, because not all mobile phone users know when to keep quiet. The speaker and his friends chat about some private topics on their mobile phones.
Like all radio devices, the signal can be blocked or interfered. Interfering with mobile phones is the same as interfering with other types of wireless communications. The mobile phone communicates with its service network through the base station. The base station divides the city into many small areas, called cells. This article will introduce the working principle of cell phone jammer and the legality of their use.When a mobile phone user is driving on the street, the signal is between different base stations transfer.The interfering device emits the same radio frequency as the mobile phone, thereby interfering with the communication between the mobile phone and the base station.
Signal jammer is mainly aimed at various examination rooms, schools, gas stations, churches, courts, libraries, conference centers, theaters, hospitals, governments, finance, prisons, military places and other places where the use of mobile phones is prohibited. To interfere with cell phone signals, all you need is a device that can broadcast on the correct frequency. Although different cellular systems process signals in different ways, the radio signals used by mobile phone networks can be blocked. The GSM network used in digital cellular and PCS systems operates in 900MHz and 1800MHz in Europe and Asia, and 1900MHz (sometimes 1.9GHz) in the United States.