@Marvin_S It looks like this is the maximum speed for Deco M4 model for its Mesh configuration. Thank you for your links and reply. Cheers!

Hello all! Yesterday I purchased a Deco M4 AC1200 (pair). I have a 1Gpbs(down)/500Mbps(up) Internet connection. It's a two three bedrooms house. I have installed my main Deco on the hallway (next to...