When you buy this item are you REALLY expecting to first figure out where the nearest cell phone tower is to your house and in exactly which direction?  Then are you REALLY planning on climbing up on your roof to erect a pole so that this thing can point directly at that cell phone tower?  No, like me you're thinking you can stick this to the window and it will increase your reception.  Well it won't. So my suggestion is don't buy it; you just end up returning it the way I did.