I have had this problem ever since I bought this speaker where Sonos will not recognize the network. I tried hard resets a few times and was able to get it to work until power went out and I lost WiFi. WiFi signal is strong and the modem is a brand new. Rev. 2.1 Firmware CGM4981COM7.3p3s1-PROD_sey. I was able to get it to work with an ethernet cable but I prefer WiFi.
I went into the xfinity site to see what features i can edit. xFinity does not recommend splitting bands with 2.4 and 5GHz. I don’t understand the reason. Also, the modem is set at WPA3- Personal Transition but offers WPA2 and WPA3 -Personal as other options. I don’t know what these mean and what I should change.
I hope someone has answers. I thank you in advance
Paul