During class yesterday, the reporter walked into several third-grade classrooms and found that the mobile phone signal was normal and there was no shielding interference. Some classmates said: "It's just that Jailbreak Cell Phone Blocker is not open for the past two days." The school is the test center for the college entrance examination. Mobile phone jammers were installed in 60 classrooms at the school last October. They are generally used for large exams such as final exams to prevent candidates from cheating. He denies using the shielding device to maintain class order in third grade and says he will not use cell phone jammer in class. It is understood that mobile phone jammers, like mobile phones, emit electromagnetic radiation. my country has a national standard for electromagnetic radiation protection: the electromagnetic radiation power density accepted by the public in the environment is less than 40 microwatts/square centimeter, which is safe. Environmental departments and environmental health research institutes can do such tests.
On August 12, the China Academy of Information and Communications Technology released an analysis report on the operation of the domestic mobile phone market in July 2021. The report shows that domestic mobile phone shipments in July increased by 28.6% year-on-year, and the penetration rate of 5G mobile phones accelerated, accounting for nearly 80%, a record high. The report pointed out that in July 2021, 5G mobile phone shipments in the domestic market were 22.834 million units, accounting for 79.6% of mobile phone shipments in the same period. From January to July 2021, the domestic market shipped 151 million 5G mobile phones, accounting for 74.3% of the mobile phone shipments in the same period. That said, nearly 80 percent of new phones are 5G-enabled. As of July 2021, the cumulative shipment of 5G mobile phones in the domestic market was 327 million units. According to the analysis report of the China Academy of Information and Communications Technology, the stock of domestic 5G mobile phones is already very large. According to data released by the Ministry of Industry and Information Technology in July, a total of 961,000 5G base stations have been opened in my country. As of the end of June, they have covered all prefecture-level and above cities across the country. In order to limit the overuse of the network, Jailbreak Cell Phone Blocker has also developed rapidly.
