@Panayiotis91 This is really bad signal quality. For Satellite Deco M5 to perform well, you should have something like this: Can you clarify: second floor Deco, did you position it just above first...

@VaclavS Ethernet backhaul should work, if you wire Deco units correctly. See this: General questions about Ethernet Backhaul feature on your Deco

@Elbetosan I had once similar error message for Android set-top box connected to one of my not smart TVs. I had to power off/on everything together: Decos (Main M9, Satellite M9, Satellite M5), ISP...

@CD5 1. How about: Old router (WiFi turned off)-> Deco (Router mode) - does it work? If it works, and you are not getting double NAT issues, let it be. If you are getting double NAT issues, you can...

@evilpouliche You can't do that with Deco alone. I had similar conversation with someone, the solution was to get WiFi Range Extender with gigabit Ethernet port. TP-Link offers good WiFi range...

@BMJO I was reluctant to update my Deco M9s when I've got a notice of new firmware in Deco app, but I have not had issues after firmware update to 1.5.1. Haven't noticed difference in performance and...