First of all, the 5G WiFi of the router has nothing to do with the 4G/3G on our mobile phone, not the upgraded version of the 4G. 5G WiFi is actually Wi-Fi based on 802.11ac protocol, which is the fifth generation technology.
For example: Jigojun bought a Ferrari Super Run (fantasy), which can only drive 70 cars in the city, 120 cars on the highway, and more than 300 cars in the racing field. But if you only have an ordinary bicycle, you'll be tired to death at most and ride to 3 or 40. It doesn't matter what road you're on.
Your bandwidth is equivalent to the performance of the car. The larger the bandwidth, the faster the speed. 2.4 GWIFI is equivalent to urban roads, which are crowded. 5 G WIFI is comparable to freeway, which can raise the upper limit. But even if the road is good, if the car doesn't work, it's no use. So if you use 1M broadband, even 5G WIFI, it will not be as fast as 100M broadband with 2.4 G WIFI.
5G Wi-Fi avoids the problem of mutual interference, which is currently used less frequently. At present, except for some flagship mobile phones, most low-end mobile phones only support 2.4G.
2.4G and 5G respectively refer to the transmission frequency of wireless routers. Among them, 2.4 GHz frequency is the most widely used, almost all computers and smartphones support it.
However, because it is so common, when we turn on the computer wireless network card, we will see all kinds of strange Wi-Fi names of neighbors. When we observe them with special software, we will find that their frequency bands overlap seriously. Bluetooth, wireless mouse transmitters and even microwave ovens are currently using 2.4G band. The problem is that serious interference will slow down the data transmission rate.
At the same time, routers supporting 2.4 and 5G frequencies are more expensive than routers supporting only 2.4G single frequencies, and few people use them at present. For example, it's like a newly built highway, where there are fewer cars and no obstacles, while another 2.4-gigabyte "old road" is already congested.
Higher carrier frequencies also allow 5G Wi-Fi to carry higher transmission rates, which is 802.11ac we will discuss later.