Does having a different iPhone's SIM tray in my iPhone void my warranty?
I sold an iPhone on eBay that had an AppleCare+ Warranty until October of this year. The buyer tells me that because the original SIM tray is not in the phone
(must've accidentally switched it ith another iPhone at some point,) the warranty is void. Is this true? Can't the actual phone's serial number be retreived by plugging it into a computer or opening the phone to see the serial number printed on the inside, or does this not matter?
iPhone 4S, iOS 6.1