@A0vy From device connected to Deco mesh Google "what is my IP" and open web site it'll recommend. Can't post links to web sites here.

You are overthinking it. Connect Main Deco with Ethernet cable to SR203 router. Configure Main Deco according to Quick Start guide that comes with Deco set. Add Satellite Decos. Switch Deco mesh to...

Oliblo wrote Hello Now I moved to 1GB/s from my provider. I only have 700mb/s with main Deco, and I keep the same as before for the second 150mb/s.... how is it possible ???? @Oliblo Please see post...

@maxperhour To be on the safe side I would also try very short, 3 feet, Ethernet cable with Main Deco. Preferably one you had for a long time and if it is Cat5E - that would be the best option. In...

@NasseAlmojel You can have 300Mbps on Main Deco with M4, S4, S7 and any other WiFi5 Deco that has gigabit Ethernet ports. They all do, it is E4 that has 100Mbps ports. So, the very short answer: Yes.

@maxperhour Yes, but "hardware" could mean not just Main Deco but also Ethernet wiring and your ISP router. You said you tested it all, and I have no reasons not to believe you, but still the issue...