that's exactly why they didn't know about this problem until later. I'm sure the bumpers were made to alleviate this exact issue
regardless of whatever steve-o says, I'm still 100% content with my iPhone 4. Unless there is another maker out there who can make something just like the iPhone 4 or better without these antenna issues, there's no point in bitching.
Don't even bring up any android doo-doo phones. I'd go back to my moto razr before I would ever PAY for an android device. They are not up to iPhone 4 standards.