Parental Blocks On Cell Phones
The Parental Blocks On Cell Phones used in the examination room is full-band, which can shield all 2G 3G 4G mobile phone signals and 2.4G WIFI signals of China Mobile, China Unicom and China Telecom. So as long as there is a mobile phone signal jammer in the classroom, all mobile phones cannot make calls. Send and receive text messages and surf the Internet. The statement that signal jammers do not shield China Telecom and China Unicom is absolutely incorrect. Unless there are telecom and China Unicom signal transmission towers near the place of use, the signals of Telecom and China Unicom mobile phones are particularly strong, and the power of the signal jammer is too small and not suppressed. At this time, it may happen that China Telecom and China Unicom cannot be shielded. . cell phone jammer
After my school’s exam room openedParental Blocks On Cell Phones, I can only use telecommunications mobile phones, because there is a telecommunications transmission tower on the mountain opposite our school, and China Mobile and Unicom are very far apart, and there will be signals when the mobile phone is attached to the wall. This is also wrong, but The farther away from the mobile phone jammer, especially the window, there may be signal leakage. The mobile phone signal jammers on the market are all full frequency bands, which can shield all the 2G 3G 4G signals, 2.4G WIFI signals and Bluetooth signals under all the three operators of China Mobile, China Unicom and China Telecom. You said that the signal at the same table is full. It may be because there are mobile base stations around, so the mobile signal is stronger, and it is difficult to completely shield the mobile phone signal jammer. If you want a mobile phone to work normally, unless the mobile phone signal is very strong, if it is a mobile signal amplifier, it is difficult to shield the mobile signal.