After iPhone 4 antenna-gate, I would never expect this to happen again. Apple likely learned it's lesson and how to improve it's testing.Can you imagine if the new phones suffer from antenna-gate? LOL
I'd be more worried about something else going wrong such as the magnets falling out of place and rattling around inside or the ceramic shield actually being very fragile. All unlikely but with such complex hardware, it's really a blessing there has never been a major recall on an iPhone.