Not sure if you test with different clients or not (tablet or laptop) Then you may find out it's the phone or it's the extender. BTW, I think you can also manually set it up not with WPS button to...

NP, bro Freud wrote Thanks for your informations Shield101

Maybe you can change wifi channel on the router or change SSID and password on the router. Not sure but you can try. Or maybe test the adapter on a different computer

should be under device info>>wan

The answer is yes stewartv wrote Final Q ! If all Deco units are in AP mode, will it still act as a mesh system with the same SSIDs and handing over between APs when moving around the house? Thanks!

you can try the beta firmware