I've found that my main deco unit appears to run below my advertised speed around 40 to 50 mb where as my two upstairs run at the advertised speeds around 145mb I'm assuming the BT smart hub 2 that the main deco unit is plugged into is hampering the deco WiFi signal (my best guess anyway) so I was thinking of plugging the M5 deco directly to the BT ONT. Any suggestions or advice would be greatly received.