Although the WiFi chips of mobile phones support dual-band (2.4GHz and 5GHz) operation earlier, the protocol used is still the 802.11n standard, and the latest 802.11ac standard is not adopted. It is not 5G WiFi in the true sense. It can be simply Think of it as 802.11n WiFi running on the 5GHz band, with a compromise in performance. If we take the highway as an analogy to the 5GHz WiFi frequency band, then the 802.11n standard will be Mercedes-Benz, and the 802.11ac standard will be a higher level, which can be understood as a sports car.
The real 5G Wi-Fi is 802.11ac, which uses a chip operating at 5GHz and can cover both 5GHz and 2.4GHz frequency bands at the same time. In addition to being faster, it can also improve the problem of small wireless signal coverage. Although 5GHz has stronger attenuation than 2.4GHz, it is difficult to pass through obstacles. However, due to the larger coverage, considering that the signal will be refracted, the new standard will It's easier to get a signal from all corners.