Only just set my system up and could do with some advice from you guys in the know . My Kcom technicolour router has my main Deco plugged into it , one other in the hall , other in far bedroom but as yet I have not disabled the wifi on the router as I'm not sure how ? 
Could this be why my wifi is not stable

and varies from room to room in my very small flat ? 
Any advice really would be appreciated 

thanks 

Dave