Yes, my iPhone 4 essentially mutes immediately when you tap the gap. That's presumably a big drop in SNR, enough to silence the call, but for a brief tap, the c

Yes, my iPhone 4 essentially mutes immediately when you tap the gap. That's presumably a big drop in SNR, enough to silence the call, but for a brief tap, the call is not dropped. Note: the bars drop with a much greater delay, so there seems to be some kind of time averaging going on. It's not a huge deal to me, but changing antenna execution (if not design) fundamentally, seems to have been quite a rash move, when suddenly the phone acquires a new behavior that other phones don't have.