The first step is to check the selected blocking process. High quality cell phone signal blockers are made from real data from the casing to the internal components. The design is reasonable and scientific, fully considering the usability, durability and practicality of the product. If you have used shielding equipment before or engaged in related work, you can test the performance and open the inner packaging of the product for comparison.
The second step is to choose a blocked brand. Although there are many blocked brands now, there are not many products from big brands. After consulting a professional online, you are shielded from the authenticity of the brand.
The third step is to check and test the relevant functions of the mobile phone signal blocking product. Why do you do this? In order to sell at a lower price, the function of the product is often tampered with, because there are many defective mobile phone signal blocking devices in shopping malls, mainly eliminating some circuits that optimize the signal, such as automatic gain control. Generally speaking, more than 200 hosts have good circuits, while less than 80 internal devices have low-quality mobile phone signals under shielding. The function of this kind of cutting-edge shielding equipment is very different, which seriously affects the normal use of mobile phone signals in the signal blocker for sale.
The fourth step is to check whether the shielded signal is interfered with. When the number of installations increases, defective cell phone signal shielding can cause very serious interference to nearby base stations. Obviously, you cannot make calls when the mobile phone signal is full, which will cause serious communication interference to other people. This behavior is suspected to be illegal. Of course, high-quality mobile phone signal shielding also has interference problems, but at the same power, the interference of high-quality high-end mobile phone signal shielding is several times or even dozens of times that of low-quality mobile phone signal shielding.