yashsingh1/xdaforums huggingface dataset:
[AT&T LG G4] SofaSpud:
Guess I'll be moving to another device then. Just thought there might be more hope for the 810. Don't want to be dealing with bootloops or other problems, just want a G3 or G4 that I can get w/o spending too much and that has low risk in rooting.

I guess I'm trying to decide on what to replace it with, and want to avoid ending up with another dud.

Would you agree that any of the following would be good choices in regard to low risk rooting: G4 t-mo H811, H815, or just about any G3 variant? As far as you know, that is.
[AT&T LG G4] hyelton:
AT&amp;T H810 Back to Stock Guide (TOT Method)

You would need a H815. T-Mobile downgrading is a no no as well.

But with the H815 you'll have no warranty.
[AT&T LG G4] SofaSpud:
Ok, great. Good to know about the t-mo rollback problem. Didn't catch that. Buying used via swappa or eBay anyway, so don't expect a full warranty, which is better reason for making a well informed choice.

Appreciate your feedback.
[AT&T LG G4] MiataManiac:
Looks like the anti-rollback version was updated within the last few days. Is there any way to bypass this using the latest TOT file (the one linked in Zagnutty's post from 12 April 2016)? LGUP will not load that TOT file due to the anti-rollback version in the TOT file being smaller than the current version on the phone (H81021y). I'll be keeping my fingers crossed for some good news as I'm at my breaking point with Marshmallow on my H810.

[IMG="MiataManiac's G4 Software Info"]https://scontent.xx.fbcdn.net/v/t1.0-9/13718613_10154483613639789_919795893209738416_n.jpg?oh=c572752190192101b4aa496e41d454c3&oe=57EB44D8[/IMG]
[AT&T LG G4] hyelton:
No there is not. If there was a way to bypass the message you would brick your device so there is no way.
[AT&T LG G4] bilalirfan:
When I'm trying to install LGUP DLL version on Windows 10 pro 64bit, it just runs the installer and vanishes. Doesn't come up with any dialogue like INSTALLATION DONE or something like that, not even any error.

What can be the problem? :/
[AT&T LG G4] hyelton:
There's nothing to the dll installer. Did you not see if LGUP detects the phone??
[AT&T LG G4] bilalirfan:
Yep it is recognizing the phone. Does it mean I'm good and secure to go?
[AT&T LG G4] ericperez380:
Hey I'm in H81021y is possible to downgrade from that version to lollipop???

Hey I'm in H81021y is possible to downgrade from that version to lollipop???
[AT&T LG G4] hyelton:
Yes.. Dll files are only for getting the device detected. Remember if downgrading it can always be risky.
[AT&T LG G4] hyelton:
Yes but downgrading can be risky with us carrier models. It can work but warning it may not.
[AT&T LG G4] ericperez380:
What about the rollback version? Wich version do i need to downgrade to LP?

What about the rollback version? Wich version do i need to downgrade to LP?
[AT&T LG G4] bilalirfan:
Yes unfortunately I have to downgrade from MM to LP as I cannot root my device. I also have AT&T H810 with 20n firmware, will follow the method Zagnutty posted as a comment on the very same thread. Wish me luck.

Do you know any risk free methods to root my device after downgrading? It would be H810 firmware 10o if I aint wrong. Thank you. :)

---------- Post added at 05:06 PM ---------- Previous post was at 05:05 PM ----------

I guess you might need this one. http://storagecow.eu/Xda/LG G4/H810/AT&T/LGH810AT V10o-ATT-US-SEP-10-2015.zip

Its stock firmware for AT&T H810 and its 10o version. Lollipop 5.1
[AT&T LG G4] ericperez380:
Are you sure about it, cause I don't want to brick because it's my daily device.
[AT&T LG G4] bilalirfan:
I'm not sure to be honest. Latest firmware by AT&T is 20y and before that it was 20n. I'm on 20n and I have started the process of downgrading. Its past 55% now. Waiting for the results. But I guess it should work for 20y as well because there's no big difference in both firmware and 20y was a security patch if Im not wrong.

UPDATE: Did it finally, all went smooth. I'm back on 5.1 tadaa!
[AT&T LG G4] ericperez380:
Sorry, a step by step guide on how to do it and what program did you use
[AT&T LG G4] bilalirfan:
If the instructions by Zagnutty were really unclear (they were clear and awesome though) then I will make a video to help you out.
[AT&T LG G4] hyelton:
The guide is in the OP as well as a video already :).
[AT&T LG G4] hyelton:
I'm glad it worked for you! :)
[AT&T LG G4] ericperez380:
Ok let me know when you upload the video, I'll be happy to see it.
[AT&T LG G4] bilalirfan:
True that. And its very easy too, no rocket science involved. Still I was wondering if you can link to me to root my H810 firmware 10o with lesser risk involved? That'd be great. :)
[AT&T LG G4] ericperez380:
I know there's a video but it's whit a LG G3.
[AT&T LG G4] hyelton:
If you go in look at my G4 back to stock guide there is a video already :)
[AT&T LG G4] hyelton:
G2, G3, G4, G5 no matter the lg device. The method is the exact same..
[AT&T LG G4] hyelton:
Sorry no clue on root. Don't keep up with anything other than stock. Rooting any device has the same risk as any other. There's no lesser risk unless you stay stock.
[AT&T LG G4] bilalirfan:
I will stay on stock but just need to root so I can actually install xposed. :)
[AT&T LG G4] ericperez380:
Yes it's the same method but would be better to see a LG G4 AT&T whit H81021y version doing it lol.
[AT&T LG G4] hyelton:
I understand, but honestly it's no different lol.
[AT&T LG G4] ericperez380:
Well it's ok then :good:
[AT&T LG G4] hyelton:
If you do make a video let me know and I'll put it as part of the guide.
[AT&T LG G4] bilalirfan:
Sure thing. :D
[AT&T LG G4] ericperez380:
Hey friend I got another question, sorry for the annoyance. The DLL file you post works for the H810? Because it says 8974 not H810.
[AT&T LG G4] hyelton:
Yes. But you shouldn't need a dll file when using LGUP.
[AT&T LG G4] ericperez380:
You use LGUp or LGFlashTool?
[AT&T LG G4] hyelton:
LGUP.
[AT&T LG G4] ericperez380:
Ok but how I make LGup to detect my device? Put the phone in Download mode?
[AT&T LG G4] hyelton:
Have the phone turned on with USB debugging enabled. And make sure your using a USB 2.0 port
[AT&T LG G4] ericperez380:
I have usb debugging on and using 2.0 port and it don't detect device

---------- Post added at 07:41 PM ---------- Previous post was at 07:35 PM ----------

Ok now it detects it
[AT&T LG G4] bilalirfan:
You just need to let your phone install drivers to your computer when you select MTP as a connection to your PC.
[AT&T LG G4] ericperez380:
Yes, know it detects it, just need the process to downgrade. I got the v10o file, what I do know? You use LGUp right?

---------- Post added at 08:15 PM ---------- Previous post was at 07:57 PM ----------

Also when I put the bin file that is the v10o tot file did I need to put the phone in Download mode or just press start?
[AT&T LG G4] bilalirfan:
You dont need to put phone in download mode. LGUP will do it for you. Just do as shown in the thread and you are good to go.

---------- Post added at 10:58 PM ---------- Previous post was at 09:58 PM ----------

And if you wanna root your newly downgraded firmware, just follow these steps: http://xdaforums.com/showpost.php?p=63962261&postcount=4

Another comprehensive guide on Reddit I found: https://www.reddit.com/r/lgg4/comments/3ir4zn/guide_how_to_root_all_versions/

2nd post in this thread contains the 4gb rooted img file of 10o. Link:https://drive.google.com/file/d/0ByR1n8l45m82dUdicXY0dW9IaTA/view

If you want to download smaller image and faster, use another link: https://mega.nz/#!so9E2bKT!ozGR_amJy5Hxl8KftlRmrbknMw9vmLotg1-VycOlOkM All credits to the uploader. :good:

I personally flashed the 4gb img file. 2gb file should work too. I rooted my H81010o successfully and now onto installing Xposed through FlashFire. Link: http://xdaforums.com/g4/themes-apps/guide-installing-xposed-locked-t3181593 All credits to Chainfire for this amazing app.

Last edit: When you are installing Xposed through Flashfire, use sdk22 arm64 by [MENTION=2476451]romracer[/MENTION] and uncheck everything when you select Flash ZIP from the app. If you check Auto mount and Mount read/write, it wont install. Took 2 mins for the whole process. Cheers!

I guess it should be helpful enough for all. I spent all my day trying out methods to do it and these are the best ones I found which actually worked like a charm. :)
[AT&T LG G4] ericperez380:
So much thanks, very helpful friend, I'm gonna restore tonight and I'll let you know how it goes. Hope it don't brick.
[AT&T LG G4] bilalirfan:
You're most welcome, happy to help and good luck! :)

Just follow the steps carefully and you wont brick your device.
[AT&T LG G4] ericperez380:
Ok I started doing the process and it gives me a error code 0x2000. Tot antirollback version is smaller than device version. Any help with that??
[AT&T LG G4] hyelton:
That would mean you cannot downgrade.. If it let you continue that means you would fully brick your device. So there is no way around it and your stuck with your current firmware. You cannot go back.
[AT&T LG G4] ericperez380:
Damn I hate marshmallow in this device...
[AT&T LG G4] hyelton:
Nothing can be done about it sadly.
[AT&T LG G4] ericperez380:
Ok thanks anyway for all the help. I'll be waiting for someone who can root MM.
[AT&T LG G4] catzilla:
Received a refurb today from LG after sending it in after bootlooping.

S/W info:

Android security patch level: 2016-06-01

Baseband version: 3.10.84

Build number: MRA58K

Software version: H81021x

Tried the original method in first post, and LGUP method from here, both fail. Didn't write down the error from the original method, but this is what LGUP said:

Error: Error Code 0x2000, TOT antirollback version is smaller than device version.

Anyone has any ideas? I am about to put this up on ebay and buy a G5...

If I can't root it, I can't restore Google Authenticator, and if I can't restore Google Authenticator, it's useless to me.

The refurb is s/n 505, so it's going to bootloop again eventually.
[AT&T LG G4] hyelton:
That error your getting is stopping your from hard bricking your device. You cannot downgrade from The latest firmware sadly with the AT&T model.
[AT&T LG G4] catzilla:
Any chance these exploits may open up an avenue?

http://www.bbc.com/news/technology-37005226

http://www.pcworld.com/article/3104...id-devices-plagued-by-four-rooting-flaws.html
[AT&T LG G4] Quote100:
i realize this is an old post but i'm trying to downgrade my brother's h810 to lp from mm. in lgup do i use the refurbish or upgrade option to flash a .tot file?
[AT&T LG G4] hyelton:
You would use refurbish. But if he was latest MM you cannot downgrade. You'll either get a message about anti roll back and it won't flash. Or you can fully brick your device.
[AT&T LG G4] SofaSpud:
Latest MM version is? I'm on h81020n which is not all that new, and there is a thread here about rollback it back, so presumably it's not relevant to your warning. I did a quick search to try to find out what the LATER LG released MM ROM's are but didn't really get an answer.
[AT&T LG G4] hyelton:
Not sure what the latest is for the AT&T model. Remember each model all have different firmwares like AT&Ts latest is going to be different from Verizon's model latest.

The thread about anti roll back is relevant to my warning.

Here's how it will go in regards to flashing.

1. It may successfully flash and you'll be downgraded.

2. It will fully brick the device

Or

3. LGUP will give you the antiroll back message and stop the flash.
[AT&T LG G4] SofaSpud:
I had found posts in a thread discussing rooting the H81020n firmware with multiple reports of success. Am trying to find it again to give it a try. Thread discussed rollback by flashing LGH810AT V10o-ATT-US-SEP-10-2015 via lgup, so I believe that my chance for success is good.
[AT&T LG G4] hyelton:
Not sure on root for MM but that's interesting if there is! What matters the most is the firmware your phone is currently running as to what firmware your going to flash when it comes down to the anti roll back. Example if someone with 20n and another device with 20y. If you use the same firmware the 20n may work, but it's a guarantee using that same firmware and you flash it on a device running 20y you'll either be stopped or it'll brick the device
[AT&T LG G4] faizalotai:
The latest version is 21z with antirollback v3

V10o is lolipop with antirollback v1 and 20n is marshmallow. Don't know what antirollback version is, but if 20n comes with v2 antirollback than there's no chances for go back to lolipop
[AT&T LG G4] SofaSpud:
Just successfully rolled back to LP 5.1 following procedure in msg #113 in this thread! Now to attempt root!
[AT&T LG G4] SofaSpud:
Haven't rooted it yet, but noticed that battery life took a major hit. Went from impressive to "woah, what happened?"
[AT&T LG G4] hyelton:
When going back to stock resetting etc it's always best to give it a few days to settle. But remember battery life can differ between different android versions as well.
[AT&T LG G4] SofaSpud:
I believe that the single biggest factor would be to run an optimized kernel. Will do a search to see if anyone has dissected the MM kernel and transplanted it to lollipop.
[AT&T LG G4] DonChino:
MM 6.0 bricked following this post...

Just to give everyone a "heads up"; but if you use this "technique" then you will brick you LG-H810 AT&T model, because I just did. I wanted to downgrade from 6.0 MM to 5.1 LP, but I guess I should have read more posts warning that attempting this with MM might brick your device, so just know it is true. If you upgraded to MM 6.0, then do not attempt this with the AT&T H810 model; since I cannot speak for other models.

I can still "see" the device when I connect to my PC, but I get no RED CHARGING light and I cannot connect to the device in any way. It seems there is some sort of tool called - BoardDiag - that will unbrick your LG phone, but unfortunately it seems the G4 is not supported yet.

My device shows up as - Qualcomm HS-USB QDLoader 9008 (COM11)

I guess I have a DEAD phone until a solution is found to save all our bricked phones... :crying:
[AT&T LG G4] hyelton:
Yes I've stated it and others have stated through out this thread about downgrading. Remember some H810 can be downgraded, but not if your running the latest MM. Your best bet is to try and warranty the device which should be easy due to the common boot loop issues.

Sadly when it comes to anti roll back there will be no fix other than warranty.

Did you use LGUP? Usually LGUP will stop you from downgrading when you try.
[AT&T LG G4] DonChino:
LG-H810 - DO NOT PERFORM if running 6.0+

LGUP did NOT stop me from downgrading, so once again NO ONE should be trying this if they are on MM 6.0 with AT&T. You should put more than just "try at your own risk" in the first post and basically state DO NOT DO this if you are on the latest Android 6.0+ builds, although in my case I can only speak for the LG-H810 from AT&T.

Fortunately, this was a second phone but I am outside of warranty, plus people are complaining that LG is not fixing phones for FREE; but checking their warranty and sending them a bill if they want their phone fixed. I am guessing it will have to take a class action lawsuit for LG to fix phones for FREE, but this technique should NOT be used by anyone running Android 6.0+.

I bricked my phone although I can see a low level connection - Qualcomm HS-USB QDLoader 9008 (COM11) - so I am hoping eventually someone will figure out a way to reformat and unbrick. In the drawer it goes, but your screenshots are not for the H810 so maybe someone will Google this and stop them from making a mistake...

LG (or maybe AT&T) wants us to brick our phones if we mess around with the software, so maybe that is why it does not perform some basic checks... :crying:
[AT&T LG G4] SofaSpud:
I believe that it's misleading to say that any H810 running MM cannot be rolled back to LP. I did it. Settings/About Phone/Software info: H81020n. Dunno about anything later than that.

The important issue is what version of MM is installed. But I suppose that if we're not going to delve into the issue past the level of the major version number (i.e., LP 5 and MM 6) then it's probably best to leave it at "don't attempt to rollback."
[AT&T LG G4] gmillz:
So I have h81020n I can downgrade?
[AT&T LG G4] SofaSpud:
Go to page 12 of this forum and read the posts on that page. There's one about half way down that specifies the process of someone else having done it. I decided to try doing it on my phone and it also worked for me. If you try it, it would be helpful to readers here if you post your results.

---------- Post added at 12:48 PM ---------- Previous post was at 12:46 PM ----------

It appears that you are correct. It seems to have improved quite a bit.
[AT&T LG G4] gmillz:
I need an mirror or something this is taking way to long to download and I have a 100Mbps download speed
[AT&T LG G4] hyelton:
A mirror for what? The speeds are just fine if it's coming from my links. Downloading right at around 1gbps for me between Canada and Netherlands.

Are you using a download manager? When downloading large files and or having a decently fast internet connection its always recommended to use a download manager of some sort.
[AT&T LG G4] gmillz:
Oddly enough it seems to be a local issue in windows. Downloads super quick in linux. But just can't get a decent download speed in windows and yes I'm using a download manager
[AT&T LG G4] hyelton:
Very strange. At least it's Windows and not your ISP haha.
[AT&T LG G4] SofaSpud:
In cases like that you can search to see if there is a torrent file available to download it with a torrent downloader app. But usually the chances of finding a torrent stub is much better for files that are widely popular, and I doubt that you'll find one for the this particular rom. Torrent downloads are usually much more efficient. Reliability is also at least as good as using a download manager.
[AT&T LG G4] gmillz:
True. I only boot windows maybe once a month anyways.
[AT&T LG G4] gmillz:
Could you share the md5?
[AT&T LG G4] hyelton:
Sorry mobile at the moment. I've never had any issues with anyone having bad downloads when it comes to having them zipped. As if there is an mismatch the TOT file wont extract from the zip nor will flashtool/LGUP let you use it.
[AT&T LG G4] gmillz:
The zip won't extract and the flash tool won't let me use it. Downloaded 3 different times. Once in Linux all corrupt.

And phone is stuck in firmware upgrade.
[AT&T LG G4] SofaSpud:
That's why it's worth the time and effort to confirm the md5 checksum before flashing!

Edit: when it's available that is
[AT&T LG G4] gmillz:
So phone stuck in firmware update, and lgup won't recognize model
[AT&T LG G4] hyelton:
Firmware update is download mode. Your using a USB 2.0 port correct? And we're you using MM? If not use the old flash tools.
[AT&T LG G4] gmillz:
Think I got it. Reinstalled the dll with LGUP and it detected. Flashing now will report back. I'm downgrading from MM to LP following the guide on pg12
[AT&T LG G4] SofaSpud:
[Slaps forehead] Didn't think to run the chksum myself, but here it is from my DL'd copy:

LGH810AT V10o-ATT-US-SEP-10-2015.zip MD5: 2da57ba1b35ac204171e7cab281f8ac0
[AT&T LG G4] Black-Dash:
I am currently on H81021z, Build Number MRA58K and I would like to roll back to H81020n. Is this at all possible? I actually used to get pretty good battery life on the latter build. Obtaining root isn't so much of an issue anymore. Now I would be grateful to not be a "wall hugger".
[AT&T LG G4] hyelton:
Sorry no there is no way to go back from that version.
[AT&T LG G4] anneryh21:
I have one question

Hi I have one question, my phone was originally the version h81010b but I was change it to h81010a but I did not like because my phone got a little slow and also I realized that the model change h810PR. My question is with this method could back to h81010b or have a more current version? thanks
[AT&T LG G4] SPARTAN_TECH:
I have a h810 10b device flashed your 10o tot and it just bootloops did hard reset same Issue anyone have 10b tot
[AT&T LG G4] hyelton:
Did you choose Referbish in LGUP? Was your device boot looping before? If so that's a hardware failure.

No there's no 10b tot. Only tot available is in the OP. Tot files are not as common sadly.
[AT&T LG G4] SPARTAN_TECH:
now i am in qdloader 9008 so i guess im screwed [MENTION=2607037]hyelton[/MENTION] i did use refurbish and yes it was bootlooping before i sold the phone to someone after rooting 10b and they made it bootloop some how
[AT&T LG G4] Senil-888:
Currently assuming that you need to do this over USB 2.0, as I've tried doing it over 3.0 using both LGFlashTools and LGUP. LGUP brought up that my phone was on 21z if i recall correctly, and that I couldn't go down to 10o (AT&T H810). I'm running the the September Security Patch.

How could I go about downgrading to LL? Could I just straight up flash a lower firmware, or will that not work? Would I have to step my way down in the versions?
[AT&T LG G4] hyelton:
Firstly yes. USB 3.0 will not work. You can only use USB 2.0. And thankfully you were, as downgrading would had resulted in a non fixable hard brick. You cannot downgrade your device at all.
[AT&T LG G4] farroo:
so final able to get it " back to stock " with your Guide. It also resolved " cannot Communicate to Google Servers "issue on previous version of the Stock firmware which led me to soft brick my device. Your Guide save my device thanks a lot again. keep up the good work.

my previous Carrier Sim inst working though.. any guess?
[AT&T LG G4] hyelton:
Your welcome :). What do you mean is not working? What's not working? No service? No imei? If you flashed a wrong model firmware before this that could of messed up your efs
[AT&T LG G4] farroo:
Its carrier locked if I m correct. IMEI is there. but carrier signals while using my local Carrier network in Sim Card, operating here in Pakistan. Tried different GSM sim cards of different carrier but no signals or calling options.

I used TOT download file from one of the link you have mentioned in your original post. firmware file is correct I guess. I may have lost " Factory Unlock " status during process of " Return to Stock".

You may have better guesses.
[AT&T LG G4] hyelton:
If it's carrier locked it will ask for a sim unlock code which you would have to buy
[AT&T LG G4] farroo:
dialing "2945*#810# says " your phone is permanently locked and can not be unlocked" Thanks for the help so far.
[AT&T LG G4] hyelton:
That would mean someone has entered the unlock code to many times. There's no way around that. Phone can now only work on AT&T in the US
[AT&T LG G4] farroo:
well thats the case I think. However, I m certain of one thing that I havnt entered Unlock Code a single time either.
[AT&T LG G4] hyelton:
Yeah but what about the previous owner?
[AT&T LG G4] farroo:
Bought online through a website.
[AT&T LG G4] hyelton:
Then most likely they or the previous owner did that. I'd try and get a refund if you can.
[AT&T LG G4] farroo:
I will give it a go. I appreciate your suggestion. let see what happens. Will surely get back with out come if any.
[AT&T LG G4] hyelton:
Your welcome :). Best of luck!
[AT&T LG G4] s.a.maan:
Mobile Network Lost after TOT

I just performed the TOT method . It all went smoothly until the phone get rebooted. Everything is working fine except my phone is not getting any network signals? I went for setting. When I press "Search Network" it says " Error while searching for network". and when I go for automatically selecting the network...It keeps on waiting a bit then nothing happens...Any idea??
[AT&T LG G4] hyelton:
What was running before you flashed this? And at any point did you flash an incorrect model firmware??

Did you remove your sim, reboot phone the reinsert sim??
[AT&T LG G4] s.a.maan:
I dont remember what was running before? I have Att H810 model...Removed the sim, rebooted phone, reinserted sim..All done but no network?

Can it be carrier locked after the update?
[AT&T LG G4] hyelton:
No once unlocked it's unlocked forever. Why did you need to reflash stock firmware? You also chose cse flash if using LGUP correct?

Only time loss of network is sim slot problem or phone has been tampered with/refurbished