So far as I can tell all the cases that say they help the iP4's reception claim to insulate the iP4's antennae from skin contact. I wonder if it would be possible to create a bigger antenna on the inside of a case (say on the inside lower half of the back) that would contact iP4's antenna but would be shielded from touch. No doubt there would be safety and regulatory concerns, but I wonder if it would be possible to boost reception this way....