I have noticed that if I put my finger over the lower-left antenna the phone's signal, contrary to Apple's claim, does diminish greatly. Still we shouldn't think that Apple's letter to consumers, which claimed that the iPhone 4's signal woes stem from improper calculation, is a complete hoax. Even with my iPhone 4 snug in one of Apple's nifty "bumpers" I still notice that, from time to time, the signal gets weak or my phone calls are less swift than usual. (For those who are curious, I live in downtown Atlanta.) With AT&T's networks flooded with old and new iPhone users, along with other subscribers who choose to do without an Apple iDevice, it doesn't surprise me that from time to time my signal wanes. Furthermore, you can't expect a company that decides to imbed the antenna of its phone in the phone's frame to get it right the first time. If you did, silly you.