Still having no joy with this. Anyone got any pointers

@David-TP Hi David thanks for getting back to me I've had the E4 set up originally but recently changed broadband supplier so the E4 was limiting speeds, I got the M4 to overcome this. I've tried as...

I've managed to get a M4 version deco unit today as I thought I would use this as my main unit to get the better speed. When I connect the M4 on its own no issues at all but as soon as I try to add...