These are occasions where silence is required, but in everyday life you will find it difficult to keep quiet because everyone is using their phones these days. For example, in the library, during a meeting, during a movie show. There are many times when we need to keep quiet, or don't let the internet interfere with our rest. With the development of mobile phones, people are more and more dependent on the Internet. Why Do You Need To Buy A Cell Phone Jammer? If you have any questions, please contact us and we will answer you as soon as possible. Each jammer has its special application range, and you can choose the product according to your needs. There are many options for cheap cell phone blockers. If you know the above two points, it is easy to pick out the right jamming device for you. The main frequency bands used in communications in the US are GSM850, GSM1900, 3G (8) and 4G (Verizon USA 4G, Sprint Clearwire WiMAX and T-Mobile 4G) Second, you need to know which frequency bands to block and how far to block. Classified by appearance: handheld phone blocker, desktop phone blocker, mini phone jammer, hidden phone signal blocker. First, you need to know what types of mobile jammers are available. Cell Phone Jammer specially developed for prisons, which can only work inside the prison and will not affect commercial signals. As you know, jammer devices are now legal in jails. They are also legally available in many schools, theaters, movie theaters, dorms, auditoriums, restaurants, etc. For example: cellular-based security system testing, cell phone testing, wireless product testing, and GPS product testing and so on, these areas where technicians have been using jammers to verify that their equipment is working properly. Jammers have many different uses in daily life. Choose Cell Phone Jammer According To Your Needs
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