Alright, I've tested with a direct Ethernet cable plugged into the main Deco and I'm getting the same speed 3-6Mbps

I have a network of 3 M5s with a Bell Fibre service 300mbps up and down. First all when I measure the speed in the Deco app I get 90-95Mbps. If I measure the speed on an iPhone connected at the Deco...