you do know that EVERY iPhone 4 has the antenna issue right? you're just in an area with really good at&t coverage, meaning that after you "death grip" the phone and the signal attenuates by upto -24dB, you still have good enough coverage that puts you in the 5th bar range, meaning you won't see the bar drop. your signal DID drop however, by upto -24dB, but it's still strong enough to show 5 bars. refer to the anandtech study of the iPhone 4 antenna for more on this. so yea, sorry to burst your bubble, but just because you have not experienced it, doesn't mean that your phone doesn't have the issue.