So I have an iPhone 5 recently swapped by Apple for a faulty power button. I recently downloaded iOS 7 on it and whenever I use the phone it gives me major headaches and more recently panic attacks. Yes, I suffer from panic disorder but they're under control except when using iOS 7. I did reduce the motion but the whole brightness and white of iOS 7 is utterly bothersome. My question is fairly simple - Can I go into the Apple Store and state my case and ask for them to swap my iPhone 5 for one with iOS 6 installed? The iPhone is still under warranty.