My iPhone4 goes from 5 to 1 bars when I touch the seam on the lower left hand side. No surprise there. However, what I've noticed is that when I bridge the lower left seam while on a call, even by the time it hits 1 bar reception is clear and there appears to be no degradation in call quality. Now when it comes to web surfing, if I turn Wi-Fi off and force the phone to use 3G, then bridge the lower left seam, the signal dies instantly - and when I remove my finger the signal is instantly back. So I get the bars to drop, but it seems to not affect call quality while severely affecting 3G internet browsing. Is this the same with anyone else?