I need something that’s going to put the signal at least everywhere in my house, as it is now upstairs is very spotty and slow, even downstairs on the opposite side of the house from where the router is is spotty, using the Comcast router for now it was good for a week then started to degrade fast, House is around 3000sqft was looking at separate modem and routers but a combo would be fine as long as it gets the signal spread out well, annnnd recommend me stuff