I did all that. Obviously if one knows about 2.4 Ghz and devices that work only on that mode as against 5 Ghz devices and has researched on top link speed capabilities of their devices would know about signal interruptions. Right adjacent to the router, the speed tops at 45 Mbps max be it on 2.4 or the 5Ghz bands. I even disabled one of the bands under the hope that the router might be distributing speeds between the two channels, but yet nothing! Same result.