re: Adding google mesh

The reason for adding the mesh network is that the wifi on my current router is crap. I have an extender and it's still crap. It's not a huge house, but I assume it's due to the walls, etc (and the router can't be moved to a more central location). Signals drop on hand-held devices constantly. Sitting out on the patio, we have to turn wi-fi off entirely.

As I understand (and correct me if i'm wrong) I need to keep the ATT Router...I'd just be replacing the wi-fi, right? So, my Google puck will plug directly into the ATT router. That said, the reason I'm asking the question is because I have things that work across the network (between wired and wireless) that I still need to communicate. For example, I use my phone or ipad (both wireless) to control my stereo or stream from my Plex (both wired), etc. I didn't know if disabling wifi on my ATT Router and using it on Google would technically be a different "network" if kept the hardwired ethernet plugged into the ATT router.

I hope I'm explaining that to where it makes sense.