@David-TP My devices will show the 5.0GHz network and give the appearance it connects to the guest network, but when doing anything (like going to Google on safari) I get the message that there's no...

I have a new Deco X20 / AX1800 (US/2.6) 3-pack that I bought a few weeks ago on Prime Day. Our ISP is AT&T and we have the Fiber 1000 package (around 991Mbps actual into our gateway). Today, AT&T...