I have an iPhone4s and am on a ComCast internet service. When I eat breakfast I like to watch Fox News clips using their APP. I am less than 20' from the ComCast modem/router. The clips will no play without pausing or stopping completely. I suspect that the problem is with FOX, because I can listen to Pandora with no problems. My wife's computer gets about 22Mbps 6' from the modem/router. I only get about 12Mbps 30' from the modem/router. Or maybe it is the router. And yes the WiFi has to go thru walls. What do you think the problem is?