Phone Number To Block Telemarketing On Cell Phones
Wireless network radio waves have different operating frequency bands. Different frequency bands have different main uses stipulated by the state, some are for military use, and some are for civilian use. The 2G/3G/4G/5G network frequency bands of civil communication operators are all required by telecom network units. Both mobile phones and communication base stations communicate on the Internet only on the specified frequency band. Therefore, this time the reason may be that 5G applied a new frequency band, so it was not blocked. And for such a situation, it is not necessarily all 5G pots. There will be no 5G shielding equipment. Only one manufacturer can manufacture it, and the price is very high. All the new shielding system software is SDR, including overseas frequency bands, which can be shielded. There are other technical problems. Second, the information management system related to the college entrance examination in our province is generally upgraded every 5 years. Provinces with problems are likely to have not reached the upgrade cycle time, so Phone Number To Block Telemarketing On Cell Phones is used, and 5G is not shielded. Due to the cdma frequency hopping technology in the early stage, some cell phone jammer It is very likely to block the 3G Internet that cannot access the telecom network. In addition, many mobile phone signal jammers cannot completely block the mobile phone Bluetooth signal, because mobile phone Bluetooth is also a frequency hopping technology.
Nowadays, the invention of Phone Number To Block Telemarketing On Cell Phones has already cleared up many safety hazards of random discipline for the examination room, so that students can take the examination under a fair and just condition. The basic principle of this kind of test mobile phone signal blocker is actually based on the method of blocking the signal of the electronic device, so that the communication signal on the mobile phone is invalid, which can avoid the situation of cheating on the mobile phone, not only for the signal of Wi-Fi2.4G It has excellent practical effect of shielding. Generally speaking, the effective range is within the radius of 0 to 30 meters. Generally, a small output power test mobile phone signal blocker is enough to cover the entire classroom, and the test room can shield the signal. Since the battery life of this type of equipment is generally three hours, although the heat removal is weak, it also makes its price and performance ratio very high, especially suitable for schools to buy signal shielding for the examination room.
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