: Activation keys are temporary. If the code is not working, restart the TV setup to generate a fresh one.
The keyword signinsamsungcomkey typically represents the intersection of the login endpoint ( signin.samsung.com ) and the cryptographic key or token used to maintain the session. signinsamsungcomkey
Report: Samsung Remote Sign-In System (signin.samsung.com/key) : Activation keys are temporary
Samsung’s proximity-based keys often require Bluetooth to be active on both the device you are logging into and your smartphone. signinsamsungcomkey