We are familiar with smartphones, such as Huawei and Lenovo in China, iPhones in the US, etc., which are very popular in countries all over the world. But how much do you know about mobile phone signals? In some places where the network is better, our mobile phone network displays 4G. However, when we are on a fast train or an underground tunnel, the mobile phone signal will become 3G, h, etc. So what do these signals represent?
We use the mobile phone to go online and search for what we need, but for mobile phone signals, we know very little, not to mention what the identifier for each band is. So far, four generations of mobile communication systems have been produced, namely 1G, 2G, 3G and 4G. Of course, 5G is already in preparation. The identity of each communication system is different.
1G is the first generation of mobile communication systems and can only make calls without a signal. 2G is an ordinary GSM network, 2.5G is to add GPRS or CDMA based on GSM, and 2.75G is a network based on GSM network EDGE network. 3G is three types of td-scdma, namely CDMA2000, WCDMA, 3.5g and 3.75g, which are 3G-based HSPDA networks. 4G / LTE is a technology that includes td-lte and fdd-lte. Although it is known as the 4G wireless standard, it is only 3.9 GB in technology.
With the increasing demand for network signals, 5G networks are already planned, and many countries and regions have already passed experiments and are currently planning to implement them. However, hesitant to make smart phones more sophisticated, more and more people are immersed in the virtual world of mobile phones, and their self-control ability is not enough, so that work and life have become a mess, so how to solve this problem?
For a person who is addicted to the mobile phone world, it is really difficult to let him not use the mobile phone from the root. In some companies, in order to control the excessive use of mobile phones, the leaders will install cell signal jammer inside the company. Only the company's internal network channel is allowed to improve employee productivity. If you don't know which type of jammer you need for your cell phone signal, you can purchase a multi-frequency jammer that blocks various signals.
