It's not surprising that after Apple finished explaining the iPhone 4 antenna issues to the press today, the company wanted to go one step further and say "yes, actually, we do test the hell out of these phones before we release them to the public." Though Steve Jobs went over the lengthy and intensive kinds of radio evaluation that goes on at Apple's headquarters, it didn't seem to be enough for the folks in Cupertino. And that, we suspect, is why we were invited (along with a small group of other journalists) to take a brief tour of Apple's Infinite Loop labs. Though we weren't allowed to shoot video or take pictures, we can tell you about what -- and what we didn't -- see and hear behind closed doors.
