Have Comcast Internet Triple Play. Modem is Cisco DPC3939. My Modem/Router is an Asus RT-N66U about 100ft via lan cable into an RV setup (tin walls). When in AP Mode i can get Internet fine. my brother in Main house has constant drops in wifi even though they are les than 25ft away from Ciscio modem/router. With my Asus router in repeater mode my brother still has WiFi drops in main house. I can wifi fine out in my RV. My laptop get wifi good but my Android devices are Laggy on wifi. My Bro has been looking into a google Ohub, me range extenders/boosters.