hey, i have a usb modem that i plug into my usb directly on my computer to go on the internet. I was wondering if I wrapped foil or taped a metal pan under it would it help the signal strength? The card usually has all four bars signal strength but itsn't really that fast. I was just wondering if these kind of cards have a max dl/up speed set that can't really be passed even if i do setup some sort of thing under it or around it (foil etc).