Navigate to Settings > All Settings > General & Privacy > Reset (Default PIN is 0000).
Samsung devices often use a "binary number" system. You cannot downgrade to a firmware version with a lower binary number than the one currently installed. Effective Alternatives to a Downgrade Samsung Tv Downgrade
This will erase all user data, including apps, logins, and custom picture calibrations. 2. Contact Remote Management Navigate to Settings > All Settings > General