Firstly, it may very well depend on who your internet provider is and what kind of router they have given you. For me, it's Charter/Spectrum if I'm not mistaken, and the router puts out both 2.4 and 5 ghz channels for devices to connect to. In my case and probably yours, you need to connect to the router through your web browser, at which point you can rename your wifi networks and give different names and passwords to the 2.4 and 5 ghz channels.
To do this, if your provider didn't give you the needed info like IP address, username, and password to log into your router, then Google the default settings of these for your particular provider. A common IP address for routers is something like 192.168.1.xxxx or something to that effect. Get your computer on your wifi network, type the appropriate IP address into your browser, then log into your router. Find the settings for your 2.4 ghz channel and name that channel of your network whatever you like. make sure you know or set a new password for that channel, then try to get your doser onto that channel, which will be done through the Jebao app on your phone.
Note that if you change the name and/or password of the 2.4 ghz channel, any other device that was on that channel already will have to log back on.
Good luck, lemme know if you're still having trouble!