I recently purchased WIFI plugs that need no larger than a 2.4 GHZ WIFI signal to pair with my WIFI at home. My Modem is capable of Toggling back and forth from 5 to 2.4 . I do not have the option to set it at 2.4 only due to the Modem being controlled remotley by Comcast. How do I Set Modem to 2.4 GHZ only.
You could log in to the admin tool at http://10.0.0.1 default user id is admin password is password
Then click on Connection / WI-FI on the left and click on edit on the 5 network.
Click on disable at the top and press save settings at the bottom of that page.
Note, if you bought Xfinity pods as extenders, they will no longer work at all. (as far as I know). 😉