(requires root): Install Kernel Adiutor → CPU → Governor → Performance.

Install the Rockchip drivers on your PC. Open the flashing tool (e.g., Rockchip Batch Tool) and load your Android 7.1.2 firmware image. Enter Loader Mode: Ensure the TV box is powered off. Insert a toothpick into the and hold down the hidden button.

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Once the is installed, do this to make it snappy: