@DrKiff Toggle Guest network isolation on, give it about 5-10 minutes to propagate, then check. This toggle is not instantaneous.

@FossXP For troubleshooting purposes: power off all Satellite Deco, leaving just Main Deco running. Turn off 2.4GHz on Main Network: Position device you run speed tests on about 1-2 meters (3-6 feet)...

@mrcoco If you are connecting TV to Main Deco, try (for troubleshooting purposes) to connect TV to Satellite Deco. Temporary bring Satellite Deco to where TV is, and connect TV with Ethernet cable to...

@mrcoco If you are sure your TV is properly connected to Deco unit with Ethernet cable, Google "How to cold boot, reboot, restart, or reset your Samsung Smart TV" and see if that will help.

@mrcoco Your model of Samsung TV has Ethernet port. Bring Satellite X60 to Samsung TV and connected them with Ethernet cable. That would help to narrow the issue: is it WiFi connectivity to Deco mesh...

@1Steven I noticed slow WiFi 2.4GHz speed with my Deco mesh, which has M9 Plus and M5. Whatever I tested it with, I could never get faster than 80Mbps. Meanwhile, I am getting up to 650Mbps with...