There’s some concern going around the internets about how if you hold the iPhone 4 a certain way you compromise the antennas and degrade the phone signal. (Apple’s position is, all phones do that, don’t hold it that way.)
Are we so ignorant that we can’t remember six or seven years ago when cell phones had pull-out antennas and came with instructions not to touch the antenna while making a call as it would degrade the signal and cause the phone to use more power (giving you brain cancer and reducing battery life)?
Geez, grip the iPhone loosely and you won’t have a problem.