For the people here who have gotten their iPhones replaced through Apple care for whatever issue it may have been, did the replacement unit contain any defects (cosmetic, dead pixels, dust, "bad" screen) or was the replacement unit sent 100% defect free? I am asking because I am wondering whether the replacement phones that Apple sends are troubleshooted and screened more extensively that the ones sold in stores. Although obviously the same phone, I could see that it would be against Apple's financial interest to send the customer a phone with some new defects only to have that unit returned again.