Mobile phone addiction is very common now, and some children have poor self-control. Installing signal jammers can prevent children from playing mobile phones in class, and also prevent students from ordering takeaway programs on mobile phones. Parents are very worried. They also feel more at ease. "There is How To Make Cell Phone Jammer With Arduino in the classroom. Another student Wang questioned the installation of the signal screen. "Although the children take their mobile phones to school, they are always sober and we trust him very much. Wang said: "Despite the teacher's contact information, we still hope to be able to directly contact the children. cell phone jammer
Mobile phone jammers are the best products for shielding signals. The installation of the signal jammer seems easy. How To Make Cell Phone Jammer With Arduino Is an electronic device that can block the signal transmission between the mobile phone and the base station. When using the same frequency as a mobile phone, the mobile phone signal jammer will cause strong interference to the communication between the caller and the receiver. Effectively block signal transmission from UMTS, 3G, CDMA, GSM and PHS. Mobile phones use different frequency bands in different countries. The 1900 MHz frequency band is the main frequency band in Germany, especially in urban areas. 850 MHz is used as a local backup. In the United States, 850MHz and 1900MHz frequency bands are used depending on the region. Europeans use GSM 900 and 1800 frequency bands as standards. The Middle East, Africa, Asia, and Oceania also use these frequencies. In Russia and several other countries, local operators have a 450MHz frequency license to provide CDMA coverage.