Anyway the analysis so far seem; if you hold the phone completing the circuit connecting two sections, as seen in the photo above, you tend to lose your signal. (Put a scotch tape over it until you get a case)
So the solution to the problem, it seem, as some Apple geniuses have suggested, fork over $30 and get a Bumper case, or any other case, preventing you from touching the edges!
Brilliant Steve, Brilliant!
May be you should give away these pinkies for free!