@sinyagent You can open Deco app and check which devices connected to Deco X50- outdoor. Because you have same SSID for Deco and for G3100, it is possible Tapo camera and Samsung tab still connect to...

@Scampy74 Can you also check hardware version of your Deco S4, I am guessing you got all them as a single set so they should all be same hardware. If not same set, you'll have to check them all. See...

@Scampy74 With firmware 1.6.1, you should be able to see Connection Preference option in your Deco app.

@Cahagg01 As you can see from document I provided that message means Main Deco can't negotiate gigabit speed over the wired link to ISP modem/router, so it downgrades to 100Mbps. Standard...

@Scampy74 There is Connection Preference feature which will let you do that, but it is not available on some of Deco models. Feature is described here: How to select a preferred signal source on the...

@Cahagg01 One more thing. When you open Deco app, do you see "Abnormal WAN Port Speed" message: Abnormal WAN Port Speed. Please Check Your WAN Port Connection