@DAServices Thx...I let ATT actually do it since there were conflicting instructions on how to set up on the web....Tom

Update: ATT put my Arris in Pass-Through mode. Only change was that the Deco wireless performance degraded to 15-20 mbs.

Hi - I just installed a Deco M9 Plus. Easy install. Everything worked fine after the firmware update (before that Amazon Prime Video channel was not working). I have 300 mbs fiber service from AT&T....