Go to XDA Forums > Android TV boxes > Amlogic S905X2 . Search for your exact PCB version (printed on the board, e.g., 825X Pro V1.2 ). Ask there with a photo of your motherboard.
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UI 3 introduces a modernized layout for Bluetooth, music, and phone links, often integrating a "kilometers per hour" display directly via Google Maps. The Trade-off: Go to XDA Forums > Android TV boxes > Amlogic S905X2