As far as I know, if the phone does not support 5G signal, there is no way to connect to 5Gwifi. This is like an old TV without an HDMI HD interface is no way to connect the HDMI interface to watch 4k quality TV programs. To connect to 5G signals, you must change your phone.
If it is not to play games, it is also possible to connect 2.4G signal, although it is not as good as 5G, but after all, the cost of changing mobile phones is a little high. Therefore, if there is nothing that must use 5Gwifi routing, then it is really good to use it.
1. Not 5g mobile phones can also use 5gwifi, but some backward ones can't.
2. Check the WLAN of the phone, we open the phone Settings, and then find the WLAN option in the phone Settings.
3. In the interface, you can see that there is an advanced Settings option, then click Advanced Settings.
4. Then, in the interface that appears, select the WLAN frequency band option and click Enter.