@Nkol7 Connect your Mac or Windows PC to the second Ethernet port of Main Deco, and run speed test with wired computer. That will help to eliminate Deco misconfiguration as a cause. If you will be...

@Mitch98 The first thing to check is proper placement of Satellite Deco. They won't provide fast WiFi speeds if they have weak signal to Main Deco. To check that, in Deco app open Satellite Deco and...

@bcPaul You have two networks: Main and Guest. They are isolated from each other (you want it that way). You have DNS server on Main network. You do not have DNS server on Guest network. Devices on...

@bcPaul Try pinging your DNS server IP address from device connected to Guest network, and also IP address 8.8.8.8, and you will have an answer.

robin_in_sun wrote Can I have 2 different SSID's for the 2.4 & 5 ghz bands on the X20 ? @robin_in_sun If you are not using Guest Network, you can enable it and utilize for that purpose.

@JLE Usually just connecting PC with Ethernet cable to Satellite Deco is enough. Try both Ethernet ports and if nothing works, the issue must be with either Ethernet cable or with PC configuration....