Fire TV Stick 4K (mantis) Prerooted Stock Images [6.2.8.1_r3]

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Ighor

Senior Member
Jul 3, 2010
83
131
IF
t.me
It needs to things to burn the efuse:
-updated TZ image (at least 6.2.8.1)
-stock efuse burner inside the rom
I think exactly this should be in the red text.

TWRP prevents the TZ update, but 6.2.8.1r2 got a workarround in the update script, so the TZ gets updated...
If you now flash a stock rom, with always enabled efuse-burner inside, your efuse is gone.
Yes, I know, just downgraded to r2 from OFW, it fixed TZ, and upgraded to OFW back. Apps that depends on DRM started to work again. I guess until next TZ update released.
 

Sus_i

Senior Member
Apr 9, 2013
1,573
666
I not removed TWRP, just flashed OFW
Isn't TWRP preventing burning efuse?
No, TWRP prevents only flashing images like TZ, LK or PL.

You see, the 6.2.8.1r2 from rbox flashs the updated TZ in order to fix DRM, but this updated TZ got also the efuse-burn instructions in there...

If you flash a stock rom above 6.2.8.0 after flashing this TZ update, nothing will prevent the efuse from burning, it will blow during the next boot. Thats why rbox noted 'never flash a stock rom'

Only way to prevent the burning (with the updated TZ installed) is to flash only prerooted roms from rbox, since he removes the efuse script in his roms...

Afaik @SweenWolf did the same with his stockrom patches, which may an alternative to the prerooted, isn't it?
 
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pixelview

New member
Jun 29, 2021
4
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Hi there !
I have only TWRP (no root) and 6281 stock on my fire 4k stick. How to return to stock boot loader, without burning anything ?
 

Sus_i

Senior Member
Apr 9, 2013
1,573
666
Thank you for reply, but i mean - is there way , to get the stick "like a new", i don't need a TWRP .
You would need to:
-install a clean stock rom with twrp,
-wipe data/factory reset with twrp,
-reboot into hacked fastboot,
-grab the boot.img out of the rom you've flashed in the first step and flash it with the fastboot flash command to boot.
-At the next reboot twrp gets replaced with the stock recovery and your stick is full stock.
-Done :)
 
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  • 2
    I have na OTA Update available, can i install it on

    6.2.8.1_r3?​

    If you have a newer stick with 'burned efuse', yes.
    If you have an older stick and if you want to keep the efuse safe, then no, otherwise it will break the shorting method.
    1
    I not removed TWRP, just flashed OFW
    Isn't TWRP preventing burning efuse?
    If someone has a stock rom with efuse burner with magisk installed, and then uninstalls it (which will flash the boot.img removing TWRP)
    One reboot will blow your efuse, which will be called by the boot.img itself.
    1
    I not removed TWRP, just flashed OFW
    Isn't TWRP preventing burning efuse?
    No, TWRP prevents only flashing images like TZ, LK or PL.

    You see, the 6.2.8.1r2 from rbox flashs the updated TZ in order to fix DRM, but this updated TZ got also the efuse-burn instructions in there...

    If you flash a stock rom above 6.2.8.0 after flashing this TZ update, nothing will prevent the efuse from burning, it will blow during the next boot. Thats why rbox noted 'never flash a stock rom'

    Only way to prevent the burning (with the updated TZ installed) is to flash only prerooted roms from rbox, since he removes the efuse script in his roms...

    Afaik @SweenWolf did the same with his stockrom patches, which may an alternative to the prerooted, isn't it?
    1
    Thank you for reply, but i mean - is there way , to get the stick "like a new", i don't need a TWRP .
    You would need to:
    -install a clean stock rom with twrp,
    -wipe data/factory reset with twrp,
    -reboot into hacked fastboot,
    -grab the boot.img out of the rom you've flashed in the first step and flash it with the fastboot flash command to boot.
    -At the next reboot twrp gets replaced with the stock recovery and your stick is full stock.
    -Done :)
  • 23
    As usual, this WILL void your warranty and I am NOT responsible for anything you do with this. Installing it properly won't brick your Fire TV, but doing stupid things with it might.

    First, you must be unlocked. You can follow the instructions here for making that happen.

    If you are first starting, you should first unlock, then install this ROM, and THEN install Magisk for root or any other addons. This rom uses addon.d to preserve Magisk and any other addons, but any system modifications like Magisk, gapps, etc, that you have installed prior to this ROM will NOT be preserved.

    If you've already unlocked and installed Magisk, then after installing this ROM you need to reinstall Magisk in TWRP.


    Starting with 6.2.6.6, Magisk is always installed.

    Beyond that, Magisk and any other addons will be preserved as you flash newer roms. Consequently, if you would like to remove root, you will need to wipe /system in TWRP prior to installing this ROM. That will prevent it from being restored when installing the ROM.

    Thanks to @k4y0z and @xyz` for the unlock.

    NEVER FLASH A STOCK ROM >= 6.2.8.0 AFTER FLASHING 6.2.8.1_r2 OR LATER! THIS WILL BLOW AN EFUSE.

    Changelog and Downloads:
    8
    I have updated the OP with 6.2.7.7_r1.
    8
    I updated the OP with 6.2.8.0_r1.
    6
    @rbox
    can you add new prerooted image for https://forum.xda-developers.com/t/...stock-images-6-2-8-1_r2.3983091/post-85725921 ?
    P.S. Last post from rbox was Jul 18, 2021 :( Last seen Sep 27, 2021
    Is something happened?

    I updated the OP with 6.2.8.1_r3
    5
    Hi guys, apologies for the noob question as I'm v new to android, i've followed the guide and successfully unlocked my firestick 4k, just wondering exactly how I go about flashing this image.
    If someone could point me in the direction of an idiots guide that would be great.
    Cheers.

    Hi,
    Can't assume responsibility if this breaks your system but this is how I've done (with essential help from community).
    Good luck:
    EDIT: This is done in Ubuntu!
    *** enable adb debugging in Fire TV settings ***
    *** connect stick to pc via usb to connect the stick to adb server ***
    *** check if stick is seen by adb server***
    sudo adb devices
    you should see something like:

    List of devices attached:
    xxxxxxxxxxxxxxxx device

    **reboot to recovery:
    adb reboot recovery
    **push rom zip and magisk:
    adb push ./Magisk-v20.0.zip /sdcard/
    adb push ./mantis-6.2.6.6-rooted_r1.zip /sdcard/
    **go to shell from adb:
    adb shell
    **install rom:
    twrp install /sdcard/mantis-6.2.6.6-rooted_r1.zip
    **install magisk
    twrp install /sdcard/Magisk-v20.0.zip
    **wipe cache (maybe not needed but helps)
    twrp wipe cache
    **reboot
    reboot -p

    ** install Magisk Manager (run command from PC in the folder where you put MagiskManager-v7.3.5.apk)**
    adb install ./MagiskManager-v7.3.5.apk
    * ** open it and check magisk is installed!! ***

    ** disable update
    adb shell
    (ATTENTION! after executing "su" command go to the fire tv screen and wait for magisk manager to accept the root and click to accept!!)
    su

    ** if su worked prompt changed from
    mantis:/ $
    to
    mantis:/ #


    **disable these 2 apps
    pm disable com.amazon.device.software.ota
    pm disable com.amazon.device.software.ota.override

    **clear a pending update and delete the last searched thing from settings. **
    pm clear com.amazon.device.software.ota

    *** I hope I didn't forget anything but can't be sure ***

    thanks A LOT TO @Sus_i for fundamental advices and corrections!