Iphone Serial Number: Ecid Check

"Exclusive Chip ID," she said, plugging the phone into her diagnostic Mac. "Think of it as the phone’s genetic fingerprint. Every iPhone has a unique ECID burned into its silicon at birth. The serial number is just the name tag—easy to fake. The ECID is the soul."

Instead of using the serial number, you must use a computer to read the ECID directly from the device: Using iTunes (Windows/Older Mac): ecid check iphone serial number

You need the serial number to perform a standard Apple warranty check. Here are three quick ways: "Exclusive Chip ID," she said, plugging the phone