It connects at 2.4. I guess I will have to take it in.

As I mentioned in the post, it's connected via ethernet, so it's just tthe wifi for usage, not for connecting the Decos. However, it does sound like you are right that it is defective.

I have a new (one month) Deco mesh network, X10. One is connected to the router, two others connect to that unit with ethernet backhaul. One unit only works on the 2.4ghz network and has much lower...

My three smart plugs and the Tapo App work fine. However, the widget says I have no devices and I need to link them. Nowhere do I find a place to link them. Android 14.