A serial number is a unique, identifying group of numbers and letters assigned to an individual Quad Cortex device [QA00AA000].
Hardware Information Menu
Go to the Settings menu > Device options > About > Hardware Information.
The Quad Cortex's serial number will be displayed on the screen.
Bottom Lid Engraving
The Quad Cortex serial number is engraved on the bottom lid.
Bottom Lid QR Code
Alternatively, you can scan the QR code engraved on the bottom lid. The serial number will be displayed on your smartphone screen.