OEM Activation 3.0 stores the product key in device firmware so Windows activates automatically from the key on the machine.

Electronic product key entry activation, a documented OEM activation method used in build processes such as Windows IoT Enterprise.

How do I check if an OEM device is activated?

Open the Windows activation status page or use Microsoft’s tool to validate OEM activation keys on Windows client devices.

Can a firmware key be moved to another device?

No. The OA3.0 firmware key belongs to the specific device and cannot be transferred to different hardware.