Is there a wifi blocker that only blocks 4G and keeps 2G wifi?
Jammer-MartOctober 2022
The current wifi jammer is all frequency bands, which can block all 2G 3G 4G signals, 2.4G WIFI signals, and Bluetooth signals under the three operators of China Mobile, China Unicom, and Telecom. The working principle of the jammer is issued by itself. The frequency interferes with the normal frequency of the mobile phone receiving the base station so that the mobile phone cannot connect with the base station so that it cannot make calls send and receive text messages, and surf the Internet normally. However, when you buy a shield, you can ask the manufacturer to only block 4G for you, and keep the 2G call function, which can also be set.
The current wifi jammer is all frequency bands, which can block all 2G 3G 4G signals, 2.4G WIFI signals, and Bluetooth signals under the three operators of China Mobile, China Unicom, and Telecom. The working principle of the jammer is issued by itself. The frequency interferes with the normal frequency of the mobile phone receiving the base station so that the mobile phone cannot connect with the base station so that it cannot make calls send and receive text messages, and surf the Internet normally. However, when you buy a shield, you can ask the manufacturer to only block 4G for you, and keep the 2G call function, which can also be set.