

This guide will walk you through the steps to unlock your Fire TV’s bootloader. Credit goes to dpeddi for outlining the unlock procedure and to rbox for developing a tool to make it incredibly simple to do. Unlike the partial bootloader unlock, this full unlock enables fastboot flashing and booting. For the time being, unlocking the Fire TV’s bootloader still requires that your Fire TV is already rooted, so this will not allow you to root newer Fire TVs. For now, the average person will gain very little from fully unlocking their Fire TV’s bootloader if they’ve already partially unlocked the bootloader. So there’s not much reason to follow this guide yet, but hopefully that will change as custom ROMs get developed for the Fire TV. At which point this guide will become more useful.

Important

If your Fire TV software is…

Any of rbox’s Pre-Rooted Custom ROMs , then you DO NOT need to downgrade. You may proceed with this guide and unlock your bootloader.

, then you DO NOT need to downgrade. You may proceed with this guide and unlock your bootloader. Stock Version 51.1.0_user_510047320, 51.1.0.1_user_510055620, or 51.1.0.2_user_510058520 , then you DO NOT need to downgrade. You may proceed with this guide and unlock your bootloader.

, then you DO NOT need to downgrade. You may proceed with this guide and unlock your bootloader. Stock Version 51.1.1.0_user_511069920, or 51.1.1.0_user_511070220 , then you DO need to downgrade before unlocking your bootloader. Follow my downgrade guide and downgrade your Fire TV to version 51.1.0.2_user_510058520

, then you need to downgrade before unlocking your bootloader. Follow my downgrade guide and downgrade your Fire TV to version 51.1.0.2_user_510058520 Stock Version 51.1.2.0_user_512073320 or Newer (including 5.0.0 and up), then you cannot unlock your bootloader and cannot follow this guide.

Guide

Be sure your Fire TV is rooted and that you’ve read the section above to determine if you need to downgrade your Fire TV before proceeding with this guide. Download the aftv-full-unlock file from rbox’s XDA post. The download link is at the bottom. Connect to your Fire TV via ADB. Transfer the file you downloaded to your Fire TV by running the following ADB command:

adb push aftv-full-unlock /data/local/tmp/

(Note: This assumes the file you downloaded is in the same directory as ADB, otherwise enter the full path to the file, like this:

adb push C:\full\path\aftv-full-unlock /data/local/tmp/ Run the command:

adb shell Run the command:

chmod 755 /data/local/tmp/aftv-full-unlock Run the command:

su

(Note: If this is the first time you’ve ever run the command su , a pop-up will appear on the Fire TV screen where you will need to select “Grant” within a few seconds before it disappears. If you miss it, then run this command again.) Run the command:

/data/local/tmp/aftv-full-unlock Your Fire TV will reboot, and should now have an unlocked bootloader. Your command prompt / terminal window will display the text “Rebooting…” and may freeze. It’s fine to force quit your command prompt / terminal window once your Fire TV reboots. [OPTIONAL] Verify that your Fire TV’s bootloader has been unlocked by following the guide here.

It’s not a required step, but you can now connect your Fire TV to your computer using an A to A USB Cable, and run the following ADB command to enter fastboot mode:

adb reboot bootloader

The Fire TV will reboot and stay on the white Amazon Logo. Staying on the white Amazon logo means your Fire TV is in fastboot mode. It is in this mode that you can flash custom ROMs now that your Fire TV is unlocked, but that will be covered in a separate guide when we have something to flash. To exit fastboot mode, simply unplug the A to A USB cable and restart the Fire TV.

You should thank (and donate to) rbox (direct donation link) and dpeddi for making this possible.

SourceXDA-Developers

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