@TSelanne 

I would probably make the Deco name different. This would avoid a device jumping between the Deco and the AT&T which will interrupt any connection, and should you be in the basement you can connect to either.

@Tony forgive me if this is a silly question..... but isn't the entire point of having a mesh system (vs a range extender) is that the system & satellites are all on the same network?  If I change the name, won't I have two networks and then I'll be bouncing back and forth between the two, depending on where I am in the house?  (fyi, the Att modem/router is on the first floor, not in the basement)

@TSelanne 

Having everything named the same doesn't mean you have a mesh network. Similar to having three Archer C7's all named the same network name. In the end, you have one network name, but if you want a mesh network you would want only the Deco units to broadcast the Wi-Fi. The easiest approach would be to disable the Wi-Fi on the AT&T device, but if you still want Wi-Fi on the AT&T I would have it different.

If you want everything named the same that would work, but should you notice random drops you would at least know what to try first.

@Tony thank you for your help, I get what you're saying now.  I tried disabling the att wireless but it wouldn't let me..... (don't understand why I followed the directions)..... so I just changed the network name back to the original/ default name so I can use our name (that we're used to) w the decos.

Somewhat new topic:  I ended up running cat6 wires through my basement ceiling and up to 1st floor where Deco Main is located.  However, if I run a wire from Deco Main to Deco1 (basement), and Deco2 (upstairs) has to be wireless, will Deco2 pull signal from dmain (1st floor)?  Or d1 (basement) ?  Or whichever has the stronger signal?

@TSelanne 

When the Deco (wireless) boots up it will find the Deco with the best connection (speed/performance) and connect to that so I would first set up the main, then the wired satellite Deco, then finally boot the designated wireless one.

@Tony thank you very much kind sir much appreciated 🙏