@Spike666 This is how it should look when 5GHz band is operational on Satellite Deco:

@rhbmcse This is a good idea to place additional unit in the middle. I would recommend going with same model of Deco, which is X50. In case you need to wall or ceiling mount new Deco unit, consider...

@GyanAccessFreak If this is wired daisy chain, with Ethernet cables, you can do that and there will be no loss of speed.

Spike666 wrote As I mentioned in the post, it's connected via ethernet, so it's just tthe wifi for usage, not for connecting the Decos. @Spike666 Then, a final test would be to bring that unit to the...

@Spike666 It is definitely a defective unit. Especially if you do see it reports in Deco app that it connects to the rest of Deco mesh on 2.4 GHz only.

@Marios_X It is possible to use Ethernet to have wired link between Deco units. You will not need to configure each Deco as different network for that. Start with this document: General questions...