Is this to be used for better WiFi reception? I have the dongle Asus sent me, and it still is in it's package, never used. I don't use the GPS or care about that, so I have never used this dongle. I am going on a trip soon where WiFi will be spotty. Someone on a message board said that they gave them a "dongle" for better reception. Is that what this thing is? Should I bring it?