Many cell phones now support dual-band wifi (2.4GHz and 5gGHz).

How to recognize dual-band wifi:

The difference between 802.11b/g/n and 802.11a/b/g/n is only one "a". Currently 802.11a is basically eliminated, but from the history of the development of wifi can be seen 802.11a is defined in the 5ghz band, so this "a" signifies that the card can work on 5g. 5g band operation and 2.4 band operation of the two have a difference, 802.11n that is, can work on 2.4g band. 802.11n can work in the 2.4g band, can also work in the 5g band, so look at the "n" is not sure whether the card is a dual-band card. And "a" can only work in the 5g band, so there is this logo, must be dual-band. So just watch the device and see if it supports 802.11a to know if it's a dual-band wifi.

Dual-band Wifi means:

The device supports 2.4GHz/5GHz dual-band wireless signals at the same time, and can support a complete wireless network including 802.11a/b/g/n, which belongs to the fifth-generation Wi-Fi transmission technology (5G Wi-Fi), and usually our daily contact with the router or some Wifi devices support 2.4Ghz Wifi. Ghz Wifi, as long as some high-end routers or future tablets, boxes and smartphones may adopt this newer generation of wireless technology.

The advantages of dual-band Wifi devices:

These include stronger and more stable Wifi signals, higher transmission speeds, and the ability to save power for wireless devices to meet the future demand for high-definition and big data wireless transmission.