yashsingh1/xdaforums huggingface dataset:
[Kindle Fire HDX 7" & 8.9" General] Icetech3:
Ahh thank you much.. yeah i went to 3.2.8, rooted with towel and kept airplane mode on.. just didnt want to mess up:) The issue with older devices is that there are soo many posts and some things can be out of date. thanks once again :)
[Kindle Fire HDX 7" & 8.9" General] Icetech3:
Thank you so much davey.. all setup and running. That "unlock any version" thread was from over a year ago i think so i wasn't sure if it still worked:) Only issue i had was i didn't know i had to put the MFID and the serial together to unlock.. but got there in the end :)
[Kindle Fire HDX 7" & 8.9" General] mclis:
Hello, i have a Fire HDX thor with fireOS 4.5.5.2. Since it is not possible to get root access with this OS-version, i'm going to make this downgrade(3.2.8)->update(4.5.5.1) process.

Is it recommended to make a factory reset before i start downgrading?

Chris
[Kindle Fire HDX 7" & 8.9" General] DB126:
What's your objective? If unlocking the bootloader is on the radar there is no need to upgrade to 4.5.5.1 as 3.2.8 can be easily rooted. Regardless, there is no need to factory reset before initiating a rollback.
[Kindle Fire HDX 7" & 8.9" General] mclis:
Thanks a lot. I really plan to unlock the bootloader to flash a CM-rom. Which method of rooting (3.2.8) would you recommend? Does the 1-klick-tool from daxie also work with 3.2.8 and is there a mirror, where i can still download the 1-klick-tool? I have been checking the 1-klick thread for weeks, and the last link is almost 2 months old and i don't want to do the unlocking part manually, when there is a tool, that automates all the steps.

Chris
[Kindle Fire HDX 7" & 8.9" General] DB126:
The 'one click bootloader unlock' unility is offline indefinitely. Manual unlock is your only option at present. Post back if/when you are ready to move forward.

Looking forward...TowelRoot or HDX toolkit are the preferred rooting methods w/FireOS v3. Be sure to keep WiFi off (airplane/flight mode engaged) while on 3.2.8; device will permanently brick if it receives an OTA update from Amazon.
[Kindle Fire HDX 7" & 8.9" General] DB126:
For awareness - may not have to roll back to 3.2.8 to root if on 4.5.5.2. Not a fan of KingOroot but remains an option. For the record KingRoot is no White Lilly but nefarious behaviors are better understood.
[Kindle Fire HDX 7" & 8.9" General] mikejturley:
Hey guys, joining the thread super late, thanks for all your hard work and stuff posted so far.

What's the latest on the state of unlocking/rooting a Thor that has updated to 4.5.5.2? Dusted mine off to see how the root community for it was doing... while charging from a dead battery it booted and updated itself.... :( My goal is to run Cyanogen or another non-FireOS ROM, and use Google Play on that.

Should I use this downgrade (will it even work from 4.5.5.2?) and then use Towelroot, unlock bootloader, install TWRP, flash CM? I saw above that Towelroot needs a network connection for a little while, but that an auto OTA during that can brick me? What's the safest way to get through this? Can it be done without a time-based risk? I really, really don't like the idea of a ticking time bomb while I'm running Towelroot. I would much prefer to be able to be slow and careful. I'm fine with risky instructions, I can follow those carefully as long as I can take my time.

I'm a little terrified of "whoops, too slow, it's a brick now."
[Kindle Fire HDX 7" & 8.9" General] DB126:
See last few posts (on/about 2016-11-22) in the following thread. I'd still go with TowelRoot as the procedure typically completes in <15 sec. Always sever the connection after 25-30 sec and immediately reboot which will purge any partial downloads. The FireOS v3->v4 OTA update is several hundred MB. Do the math based on the speed of your network connection. Should be fine.

Using KingRoot on 4.5.5.2 is also an option but you many end up on 4.5.5.3 (or higher) which is not rootable at present. If that happens you can still go the 3.2.8 route.

http://xdaforums.com/kindle-fire-hdx/orig-development/rom-cm-13-kindle-hdx-2015-11-29-t3259732
[Kindle Fire HDX 7" & 8.9" General] mikejturley:
Thanks so much for your help. I got through this and am now happily rooted with an unlocked bootloader. Now to figure out what ROM to flash... the latest CM nightly won't boot, it just hangs at the boot animation. But this is probably not the place to troubleshoot that. I'll try some older nightlies.
[Kindle Fire HDX 7" & 8.9" General] DB126:
Forget the CM 13 nightlies for now; they are broken. Suggest CM 12.1 or either of the Fire Nexus builds (here, here). Be sure to read the OP in each thread for details.
[Kindle Fire HDX 7" & 8.9" General] mclis:
Just to be clear, you managed to root directly 4.5.5.2? What tool etc. did you use? When I try to root with Kingroot, it always fails.
[Kindle Fire HDX 7" & 8.9" General] mikejturley:
No, I tried Kingroot (both over USB and the APK version) and it failed. I had to use the rollback from the OP of this thread, and then I used Towelroot, then followed the manual unlock instructions from another thread (linked above). I pushed and opened the Towelroot over ADB so i could do it quickly.

Also, [MENTION=5488402]Davey126[/MENTION], One thing to note is that I didn't need to connect the tablet to the internet at all, towelroot apparently didn't need it. I did the downgrade while in airplane mode, and then after I booted in 3.2.8, I never even gave it my wifi password. All I did was enable ADB, sideloaded Towelroot over ADB, ran it, rebooted and I had root. No risk. YMMV.

Also I'm happily using the Marshmallow-based Fire Nexus build :) it is perfect. Very happy with my results.
[Kindle Fire HDX 7" & 8.9" General] Vanb85:
Someone on reddit posted the information that you provided below as a means to rollback Thor 4.5.5.2 in order to gain root access. However, looking at the date, you posted this prior to the 4.5.5.2 update. Will this method still work for that update, or will I end up bricking my device if I follow these instructions to roll back my HDX 7?

eta: Also, will rolling back to 3.2.8 and then updating to 4.5.5.1 wipe my device, or will all my apps still stay in place through all of that?
[Kindle Fire HDX 7" & 8.9" General] DB126:
Beyond rooting what is your objective? If looking at custom ROMs there is no longer a need to update to v4.x after rolling back to 3.2.8. Simply root, unlock the bootloader (requires a few technical skills) and flash one of seven custom ROMs based on KitKat, Lollipop or Marshmallow. All include full support for Google Play Store/Services.
[Kindle Fire HDX 7" & 8.9" General] Vanb85:
No, I'm not interested in the custom ROMs. I just want to re-root my device (lost it after the update) and re-install the Google Play Store. I had been trying to wait for someone to root 4.5.5.2, but it doesn't look like that's going to happen. So a rollback appears to be my only option. I just want to make sure I'm not going to brick my device if I follow those instructions on that version of the OS specifically. At some point, I may decide to play with the custom ROMS, but that's not the priority at this point.
[Kindle Fire HDX 7" & 8.9" General] DB126:
Understood. In that case the instructions referenced are fine. Then follow the first two steps in this post to root and block OTA updates.
[Kindle Fire HDX 7" & 8.9" General] Vanb85:
Great. Thanks. Just one more quick question. Will the downgrade wipe the data from my device, or will all my apps with their data stay as they are? In other words, does this process just change the OS without affecting the other data?
[Kindle Fire HDX 7" & 8.9" General] DB126:
Sorry - meant to address that in previous post. Rollback wipes data partition by design; don't have any control over that. Update preserves data but is irrelevant in your situation due to previous downgrade/wipe.

For awareness it has been reported kingOroot (note 'O') is effective against 4.5.5.2. No confirmation yet and kingOroot appears to be even more insidious than KingRoot being nearly impossible to remove.
[Kindle Fire HDX 7" & 8.9" General] Vanb85:
I would prefer to root without doing a rollback, but the bolded sounds a bit ominous. Should I stay away from KingOroot, or is it okay to use it if I have a preference for rooting 4.5.5.2 without the rollback?
[Kindle Fire HDX 7" & 8.9" General] DB126:
I would stay away from KingORoot unless all the following are true

- must retain existing app/data portfolio

- need for root is immediate (need vs want)

- no mechanism/desire/time to backup device contents

- comfortable living with a tool from unknown authors that calls home regularly and actively resists uninstallation
[Kindle Fire HDX 7" & 8.9" General] Vanb85:
Oh, okay. Yeah, I guess I'll stay away from KingORoot. I want my device rooted, but I'm not in desperate need for it to happen immediately. I guess I'll just take the time to back up my data and then do the rollback then root method. Thanks so much for your help.
[Kindle Fire HDX 7" & 8.9" General] khoacao96:
If KingOroot can root 4.5.5.2, then KingRoot can too (in the future) right?
[Kindle Fire HDX 7" & 8.9" General] DB126:
That's typically what happens. These tools compete for access to your device and personal information. Offering the most comprehensive root solution is a Darwinian response.
[Kindle Fire HDX 7" & 8.9" General] zelsphere:
Hi,

I'm new here and with tablets in general.

I've just bought an second-hand Kindle Amazon Fire 7 HDX which have never been rooted before and is on 4.5.5.2.

Is it possible to downgrade the device with this method? I simply just want to use google store and google play service, nothing fancy.

Thanks in advance :o
[Kindle Fire HDX 7" & 8.9" General] DB126:
You no longer have to downgrade FireOS to 3.2.8 (risky) as 4.5.5.2 can now be rooted with KongRoot: https://kingroot.net/

Google Play Services/Store do not run well on FireOS v4. If access to the Play store is a priority you would be much happier with a custom ROM. Several do not require an unlocked bootloader which can be a barrier to some.

Look at the first two steps in the OP (first post) of the following thread. Ignore steps 1.2 and 3+ which deal with unlocking. If this seems approachable then installing a custom ROM is well within reach.

http://xdaforums.com/kindle-fire-hdx/general/thor-unlocking-bootloader-firmware-t3463982
[Kindle Fire HDX 7" & 8.9" General] overfiend:
May I please ask for a bit of help? I'm trying to rollback from 4.5.5.2 on HDX 7 4G/LTE model... so I've downloaded the applicable file directly to the tablet and used ES File Explorer to move it into the root dir. It is detected without issue, and it applies the update, or so it appears to. Then right after it finishes applying, it says "Error!" and then after another minute or two delay it boots back into 4.5.5.2.

Am I out of luck here? My main goal here is to rollback the unit because the LTE radio is completely broken, and I have a feeling the OTA broke it. Amazon has been useless in giving any pointers of course, they say the tablet needs replacing. Pretty sure I can get it to work again if I roll it back.
[Kindle Fire HDX 7" & 8.9" General] DB126:
This glitch has popped up from time-to-time with no definative solution. Sometimes a factory reset will fix it but that action will also wipe out your apps and data. Various OTA blocks can interfere with manual updates/rollbacks but it sounds like you never applied that. Is device rooted?
[Kindle Fire HDX 7" & 8.9" General] overfiend:
It's not rooted, completely stock and I just wiped it beforehand. I can try wiping again? I'm not opposed to rooting.
[Kindle Fire HDX 7" & 8.9" General] DB126:
A second wipe can't hurt but likely won't help either. You can try to root with KingRoot. Be aware this tool has malware like characteristics. Recommended only if you plan to immediately wipe device and install a custom ROM. Fire Nexus and CM11 (KitKat builds) support LTE radio on this device. No voice.
[Kindle Fire HDX 7" & 8.9" General] overfiend:
I'll do that. I guess I understand not wanting to wipe, but I always keep that option fully on the table until I'm fully satisfied with the way my device is working. Right now there's nothing on there, so I guess I'll be doing Fire Nexus with Safestrap.

Update: Kingroot not able to root either. Will try doing a full wipe one more time, then Kingroot. I have a feeling this isn't going to go very far.
[Kindle Fire HDX 7" & 8.9" General] DB126:
- for awareness you can not do a 'full wipe' unless rooted; stock 'factory reset' only clears the data partition

- after performing a factory reset do not register device with Amazon

- KingRoot often takes multiple iterations before successfully rooting; reboot between attempts

- a solid WiFi connection is required for rooting

- if you do secure root strongly recommend NOT installing Safestrap; instead post back for guidance on installing native TWRP (relatively easy) which can be done w/o unlocking bootloader
[Kindle Fire HDX 7" & 8.9" General] overfiend:
Hey Davey,

I got Kingroot going finally, all is good there. I verified root and then I installed Safestrap. I had some stability issues thereafter and put it aside last night.

I'm going to take your advice and wipe the whole thing again and put on TWRP. I mistakenly assumed that it required unlocked bootloader. Can you give me any pointers for putting it on?

Fire Nexus did nothing to make my LTE radio work again BTW, so I think I'm going to throw in the towel on trying to make it function again. This used to be my mom's tablet, then she was having trouble with the native email app not attaching her cat pictures when she wanted to send them. Having been through it before, there was no problem I could reproduce, so I just said, here, take my Nexus 9 (which is WiFi only). She never had a mobile data plan, so I had no idea that the 4G radio was toast on this one. Interestingly enough, it shipped with an AT&T sim, which was never activated but installed. After about a year, I assume they deactivated the unused card, and the tablet started complaining "invalid SIM" all the time. So no problem, I just took this card out and tossed it. Anyhow, I'll be happy with just having a stock Android tablet, LTE or not.
[Kindle Fire HDX 7" & 8.9" General] DB126:
Hi - thanks for background/details. Travelling today so just a brief response. To install TWRP simply follow step #2 in the following post (also see prerequisite section). Don't worry about steps #1 or #3 as they deal with unlocking the bootloader. Those steps are highly recommended but not required if only using KitKat (Android 4.4) based ROMs.

http://xdaforums.com/kindle-fire-hd...ing-bootloader-firmware-t3463982/post68742099
[Kindle Fire HDX 7" & 8.9" General] overfiend:
Will do. Thanks! Not ready to unlock the bootloader yet, but maybe I'll get there someday.
[Kindle Fire HDX 7" & 8.9" General] jack1213:
G'day all, recently i bricked my fire tablet with rollback to 3.2.8 and OTA update to 4.1.1. Is it possible to unbrick device? I saw only instruction for 3.2.6. rollback.
[Kindle Fire HDX 7" & 8.9" General] DB126:
Nope - she's a gonner. Sorry for your loss.
[Kindle Fire HDX 7" & 8.9" General] overfiend:
I just wanted to drop a line to those wanting to use Kingroot! It seems like the PC version of Kingroot has some sort of malware attached to it.

I had put together a new machine about a week or two ago, fresh Windows 10 install and everything. It's a crappy mini PC, Celeron, but 8 GB and SSD. So it was running adequately well, until I downloaded and used Kingroot, which I got direct from their site. I was then browsing XDA using Edge, and was noting how slow it was, how scrolling up and down was painful, and opening a new tab was taking eons... Well I checked the CPU usage and Edge was pegged at 99-100% most of the time. I tried everything, to no avail. Uninstalled Kingroot of course. Spybot found nothing out of the ordinary to report, neither did Windows Defender.

Now, the last thing that sealed my conclusion: I was using Google Duo for video chatting the other day, and my girlfriend was claiming that I was pixelated. Strange. So I thought, let me turn off the PC that I am suspicious of (which was in an idle state - or so I thought). After video chatting with her for 2 hours, simply shutting down that machine improved the video quality on her end instantly to the effect that she described it as better than the prior 2 hours. Mind you, I have all of the Windows privacy options set so that it doesn't share updates, doesn't track website visits, etc.

Yesterday morning I used Windows' inbuilt "reset this machine" function as a last resort before I just clean installed from a USB. It seems to have fixed the issues, everything is running properly now.

I'm not a big fan of throwing a certain app under the bus without having FULL proof, but Kingroot totally coincided with all of this nonsense, and there was literally nothing else on the box. Absolutely nothing.
[Kindle Fire HDX 7" & 8.9" General] DB126:
KingRoot's malicious behaviors are widely recognized. Always have to ask yourself: 1) why does this exist; and 2) how is development/support/distribution monetized. If the answer to one/both is not clear you probably have something bordering on malware.
[Kindle Fire HDX 7" & 8.9" General] ivacor:
First of all, I'm spanish and my english isn't as good as others.

I'va been looking and reading, and it isn't clear if I can finally unbrick my apollo.
[Kindle Fire HDX 7" & 8.9" General] DB126:
Do you recall what version of FireOS was on your device and what actions led to the device becoming bricked?
[Kindle Fire HDX 7" & 8.9" General] sflm70458:
That's really all she wrote this was just an upgrade back to 4.1.1 and mine also bricked. It wont even turn on and is not recognized by my pc. How did an update kill the bootloger?
[Kindle Fire HDX 7" & 8.9" General] DB126:
Device is toast - there is no known recovery short of replacing mother/daughter boards which is typically cost/effort prohibitive. Sorry for your loss.

Unfortunate you followed this obsolete procedure. All versions of FireOS v4 can now be rooted; the bootloader can also be unlocked on nearly every rooted 3rd gen HDX opening the door to a pallet of custom ROMs ranging from KitKat to Nougat. Rollbacks are no longer necessary.

As you are new to XDA a quick word of advise: always post your intentions (briefly) before acting. If there is a better way or unusually high risk someone will usually respond.
[Kindle Fire HDX 7" & 8.9" General] mykey38:
I have a Fire HDX on 4.5.5.2 and have installed Kingroot app which I have run on at least 10 occasions and root hasn't been achieved as yet.

Is it just a case of trying until success or has my luck ran out
[Kindle Fire HDX 7" & 8.9" General] DB126:
KingRoot can be frustratingly stubborn (more accurately unsophisticated). The algorithm that tries different root solutions is not exhustive and does not seem to learn from recent failures. You can increase your odds by performing a factory reset from the stock recovery menu and NOT register with Amazon when the device restarts. Note a factory reset will remove all personal content (apps and data).

You can also try the Windows desktop (tethered) variant of KingRoot which is sometimes more successful. If all else fails a rollback to FireOS 3.2.8 can be attempted. Please post for further guidance if you opt for that route as it is easy to permanently brick the device with an improperly executed rollback.
[Kindle Fire HDX 7" & 8.9" General] mykey38:
Is it better/safer to keep running Bigfoot until root is achieved or try it a couple of times and then come back to it later, probably a stupid question sorry.
[Kindle Fire HDX 7" & 8.9" General] DB126:
Wrong forum, mate.
[Kindle Fire HDX 7" & 8.9" General] mykey38:
Sorry typing on a kindle isn't great, I meant Kingroot not what it autocorrected to.
[Kindle Fire HDX 7" & 8.9" General] DB126:
No risk in repeated runs but at some point there are diminishing returns. See prior posts regarding factory reset, not registering device with Amazon and using the desktop varient of KingRoot.
[Kindle Fire HDX 7" & 8.9" General] kkcheong:
I would not touch any procedure except Kingroot because that is the most safest for noob like me.
[Kindle Fire HDX 7" & 8.9" General] tramCS:
Is it possible to unlock the bootloader and install twrp from kk-nexus-image and safestrap ?

THX

Christian
[Kindle Fire HDX 7" & 8.9" General] DB126:
Yes - https://xdaforums.com/kindle-fire-hdx/help/help-thread-question-noob-friendly-t3206752/post73103932

No special considerations needed coming from Safestrap v4. Recommend performing step #2 ONLY to get started; then follow-up with steps #1 and #3 after TWRP is installed and demonstrated to be working. Good luck.
[Kindle Fire HDX 7" & 8.9" General] tramCS:
Thanks. Will the "old" image boot afterwards ?

THX

Christian
[Kindle Fire HDX 7" & 8.9" General] DB126:
Yes through step #2 provided another image is not flashed (overt action by you). Although current image usually survives step #3 assume it will not and take appropriate preparations before unlocking bootloader (eg: backup important files).
[Kindle Fire HDX 7" & 8.9" General] tramCS:
I have installed the TWRP and come into it. I cant boot the old image. Have i unlock the device ? It shows only Kindle and [fastboot].

Thx

Christian
[Kindle Fire HDX 7" & 8.9" General] tramCS:
When i try to unlock.bat ... it comes "waiting for device" ...
[Kindle Fire HDX 7" & 8.9" General] tramCS:
I hve installed aboot. Was this wrong ?
[Kindle Fire HDX 7" & 8.9" General] DB126:
See this post to install drivers (assuming a Windows host) that *should* enable fastboot communications. Installing aboot is necessary part of step #2 and was successful if you are able to boot into TWRP.
[Kindle Fire HDX 7" & 8.9" General] tramCS:
Sorry ... i dont get it... i see only a yellow ! at "other devices" ...

THX

Christian

---------- Post added at 09:17 PM ---------- Previous post was at 09:16 PM ----------

How can i "update Win driver to "Mot Composite ADB Interface" ?

THX

Christian
[Kindle Fire HDX 7" & 8.9" General] DB126:
This is a basic Windows question; Google is your friend. Short response:

- place device in fastboot mode and tether to Windows host

- right click device with yellow bang (!) and select 'Update driver'

- select 'Browse my computer...'

- select 'Leak' me pick...'

- look for Not Composite ADB Interface (might have to uncheck box that restricts search to compatible hardware)

- try different drivers until 'Ready' appears on HDX screen
[Kindle Fire HDX 7" & 8.9" General] tramCS:
Sorry ... It doesnt function at me.

I have installed ubuntu at virtual box. I have installed android-tools-adb and android-tools-fastboot. The first time i get a "ready", but when i try to unlock.sh ...

device not found.

Best Regards

Christian
[Kindle Fire HDX 7" & 8.9" General] tramCS:
I am confused. Sorry for the circumstances. Can i go back the old safestrap-config ?

THX for your patience

Christian
[Kindle Fire HDX 7" & 8.9" General] Noodly:
Thank you so very much!

This is a life saver​

The thread says it works for Fire OS 4.5.5.1, which does have the ability to root. However, Fire OS 4.5.5.2 came out which was just an update to break root. The good thing is, that this works for 4.5.5.2 as well!

And. It. Is. So. Simple.

All I had to do, is download the file for my device, place it into /sdcard using Es File Explorer, go into Settings, Device, Software Updates, check for updates and it was there! All I had to do next was press update and sit back. I don't really know why people are mentioning the use of a PC but yeah!

Please tell me if I've done anything wrong. However I doubt it as i'm writing this reply on my downgraded, rooted Kindle Fire HDX 7"! By the way, I have disabled OTA updates ;)

Once again, thank you so much!
[Kindle Fire HDX 7" & 8.9" General] tramCS:
I have installed a debian-livesystem ... fastboot ok ... but adb-connect is unauthorized. How can i change to authorized ?

THX a lot

Christian