I have a Arris SBG8300 DOCSIS3.1 Modem Router. I had separate bands for WiFi, one 2.4 GHz and other 5 GHz. Both used to show up on wifi settings for connection. For the past two days I don’t see 2.4 GHz band anymore. I seldom see the 2.4 GHz band but when I try to join that network, I get the message “Couldn’t join network”. I have smart devices which use 2.4 GHz band and since 2.4 GHz is no more available, all the smart devices are useless. I have tried restarting the modem. I have also done a factory reset but 2.4 GHz band does not show.
Any help is appreciated.