@Cahagg01 As long as you keep getting "Abnormal WAN speed" messages in Deco app, there is nothing else to do but try different Ethernet cables and different ports on Main Deco and ISP modem/router.

@sinyagent Tapo camera runs on WiFi 2.4GHz. There are two ways to force it connect to Deco X50- outdoor: 1. Turn off WiFi 2.4 GHz band in 3100 router. This is preferred option if you do not have in...

@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...