You need a USB-C data cable and Fastboot tools. After unlocking the bootloader, flash using:

fastboot flash bootloader bootloader.img
fastboot reboot-bootloader
fastboot flash radio radio.img (if applicable)
fastboot flash system system.img
fastboot flash vendor vendor.img

Important: This works only on the ADT-3 hardware (discontinued but available second-hand). Do not attempt to flash these files onto an NVIDIA Shield or Sony TV—you will brick the device.

Android TV 12 introduces the "Material You" design language, and it is the highlight of this build.

With the evolution of smart home entertainment, many users are looking to breathe new life into old hardware or build their own DIY media centers. This has led to a surge in interest surrounding "Android TV 12 ISO downloads." However, before you hit that download button, it is crucial to understand what these files actually are, where they come from, and the risks involved.

If you only need to test apps, explore the interface, or develop for Android TV 12 without hardware, Google provides an official emulator image through Android Studio. This is the closest legal equivalent to an "ISO."

Whether you succeeded with the emulator, ADT-3, or a custom ROM, here’s how to optimize Android TV 12: