I find it funny that people blame their cases for scratching the phone when the phone is prone to scratches. I have that clear case and have not had a scratch on my phone yet. These phones have various first generation issues that don't manifest themselves across all of the units equally. I wouldn't be surprised if the manufacturing process was improved on a per batch basis. I'm not surprised that Apple's willing to take back phones no questions asked. Could Apple be looking at the imei numbers to determine which batch yields superior product? We could be human guinea pigs. We are not alone. 
