yashsingh1/xdaforums huggingface dataset:
[AT&T LG G4] hyelton:
Most likely no. Especially if it's the latest firmware.
[AT&T LG G4] rogerssnpy:
think its running V2 from what i seen
[AT&T LG G4] hyelton:
If it's antirollback v2 no you can only upgrade can no longer downgrade.
[AT&T LG G4] daywalker9:
Hi my lg g4 is stuck on bootloop. Is this method valid to fix the bootloop? please reply asap i m really worried.
[AT&T LG G4] hyelton:
No. This has been brought up many times here, only fix is board replacement or warranty. Assuming you didn't do anything to cause the bootloop?
[AT&T LG G4] daywalker9:
nope. i didn't do anything. i asked the technician as well. he also said board will be replaced. is there anyway i can copy or erase my data out of it before that procedure?
[AT&T LG G4] hyelton:
Sorry there wouldn't be anyway that would be cheap, as you'd most likely have to have it taken to a data recovery specialist.
[AT&T LG G4] Arish Khan:
Sim card not working after Process

:crying::crying::crying: after using this method i came back to the stock firmware but there is a new Problem, i am not getting anymore services now, I rebooted my phone without sim card it prompted that no sim card detected but when i booted with sim card inserted in it i was unable to get any services Moreover i am not an AT&T user and i was using this sim without any error before coming back to stock

Please help me!
[AT&T LG G4] maxboero81:
Does It work with locked bootloader???
[AT&T LG G4] hyelton:
The boot loader was never unlocked to begin with (I don't think..) These are are all stock files there would be no reason to have a unlocked boot loader to use this method.
[AT&T LG G4] hyelton:
That normally happens if you flashed incorrect/wrong model firmware. What's your model? And what did you flash? Are you for sure on your model? Did you buy it "used" or "referb"? It may not be the model you think it is.
[AT&T LG G4] Arish Khan:
I dont know i bought it used and in the booting process AT&T logo also appeared i actually installed the 6.0.1 update using adb since then it is not working and i am not sure model is this but in the settings>about device > it shows LGH810 and i downloaded the firmware from the link you provided at your thread but i downloaded the marshmallo tot now i think i should try the lollipop tot that you provided there

And one more question

Can i flash LGH815 ROM on LGH810 AT&T
[AT&T LG G4] hyelton:
If you updated and it caused problems as in not booting it's most likely due you bought a phone that's not its actual model. Only real way to know is take the phone apart to know the actual model.

No you can only flash firmwares based for your model.
[AT&T LG G4] Arish Khan:
The only thing i know is when i bought the phone it didnt had any AT&T app and no other features of AT&T and my carrier data was working preety and device was rooted too the firmware version that was installed was H81010b

But after update the AT&T apps came back and root was removed due to marshmallow and i dont know since than phone is detecting the sim card but no services are availible ??
[AT&T LG G4] hyelton:
Yeah it's most likely not an AT&T device. I'd return the device or complain where you bought it from as it's most likely a Sprint device.
[AT&T LG G4] Arish Khan:
But whenever i boot it it shows AT&T logo and it showed it the same way before flashing and updating Moreover, as you said the firmwares are model based and we can not flash the firmware of other models so i had flashed AT&T firmware and the flash was successful everything is working fine but only fault is it is not providing any carrier services and i dont even have an AT&T sim card becuase i am from Pakistan ??
[AT&T LG G4] TaimoorBoss:
Hello i have a question any answer is appreciated

I am on h810 10I can i flash the new 21y tot or kdz directly or i need to flash the previous files first
[AT&T LG G4] hyelton:
You don't have to manually go through each one. But make sure you have an actual H810.
[AT&T LG G4] maxboero81:
:D Lollipop 1 MM 0 ...really goooood job
[AT&T LG G4] bhanuchowdary:
is this method work to downgrade from h81020y

I recently updated from h810v10o to h81020y using available TOT file, I am facing issues while setting lock screen and uninstalling apps. is it possible to downgrade from h81020y to h810v10o? please help.

Thanks in advance
[AT&T LG G4] hyelton:
Sorry there's no way to downgrade. It's a very common problem. Did you get your phone new from AT&T or did you buy it somewhere else?
[AT&T LG G4] TaimoorBoss:
Hey can some one tell me which dll file should i use with h810 21y tot file 8997 or what?
[AT&T LG G4] bhanuchowdary:
I bought it in UAE, and is any one knows why this error come, is it related to hardware or software? Why can't AT&T provide answer on this.
[AT&T LG G4] hyelton:
You wouldn't need a dll file as you would use LGUP
[AT&T LG G4] hyelton:
No one knows but it's most likely hardware. AT&T can't support the phone if it was bought outside of the US as it's most likely been tampered with.
[AT&T LG G4] haywhyze:
Thanks a lot... this worked for me... I've tried every possible way without result
[AT&T LG G4] NorthGod:
Recently i bought LG G4 H810 AT&T with MM and version 81021y and cant downgrade to LL.

LGUP every show a rollback's error.

What i can do?
[AT&T LG G4] hyelton:
If you want to downgrade you'd have to replace the motherboard with a board that has 10o as an example. That's the only way as you cannot downgrade due to antirollback.
[AT&T LG G4] Ahmedsa72:
Recently i bought LG G4 H810 AT&T with MM and version h81022b can i downgrade to MM h81021y
[AT&T LG G4] ahriii:
hey

my g4 is H810 but there is no "o" in it and i dont know the letter of my version so i tried your tutorial. Ive been at it for 2 hours now and it keeps saying "fail to get boot complete status.
[AT&T LG G4] hyelton:
There's no such thing as an H810o. Only H810. To check your software version it's under settings.

Why are you needing to flash your device in the first place?

Fail to get boot complete status just means it rebooted. That's normal and is not an error message it just means the flash is done.
[AT&T LG G4] ahriii:
hi

I know this is not the correct thread but do you have know how i can update from lp to mm? i followed a guide yesterday and i successfully updated it to mm but then when i tried to go to the security settings it just crashes and when i try to uninstall an app it automatically reboots itself. pls help thanks.
[AT&T LG G4] hyelton:
What's your model? And where did you buy the phone? Are you 100% sure your model is what it says it is?

That issue only fix is board replacement or warranty
[AT&T LG G4] Hansijay:
i am having the same problem

i bought lg g4 1 month ago..it was 5.1 lollipop and everything was perfect i can delete apps i can go to security settings

after 2 todays i had pop up saying an update is available so i updated it

now its 6.0 marshmallow..it just destroyed my phone.. :(

cant delete apps.. (deleting apps reboots my phone)

cant use 3rd party apps ( cant check UNKOWN resources )

cant go to security setting..shows error

cant lockscreen my phone

please some..show me a way to go back to lollipop

i been searching internet for 2 weeks without any luck
[AT&T LG G4] hyelton:
You cannot downgrade due to antirollback. Only fix is a board replacement. That is hardware failure and or you where sold a wrong model phone.
[AT&T LG G4] Hansijay:
thank you for replying

this is my phone info

android ver: 6.0

Kernel Ver: 3.10.84

build num : MRA58K

software Ver : H81022f

but the problem is where i live they dont sell mobile replacements....

umm cant i upgrade it to nougat ?

Thank you again..
[AT&T LG G4] hyelton:
To know your true model you have to take the phone apart.

There's no nougat (yet) for the H810
[AT&T LG G4] Calingo:
Lg g4 at&t h810

What was your anti rollback number :rolleyes:
[AT&T LG G4] NaffyG:
My LG G4 bricked due to manufacturer defect and I got a free replacement from LG. When I got it back it is on H81022f with MDF v2.0 Release 2. Is there any hope for me to roll back to a 10o rooted or rootable build via TOT method or am I pretty much screwed?

Thanks,

NaffyG
[AT&T LG G4] hyelton:
Sadly there’s no way to downgrade from that.
[AT&T LG G4] pdxvital:
What about a more recent TOT image?

From what I have read if you try to roll back you may trip a antirollback mechanism. I am not clear if the h81022f build can be rolled back to a more recent tot such as h81021y? I have seen some TOT files more recent than h81010o like this thread started with.

So any idea if one can roll back at all from this new 22f at all and if to what have people had luck with?
[AT&T LG G4] hyelton:
That would depend what anti rollback is at on the previous tot compared to the new software.
[AT&T LG G4] robertaguilerajr:
h810-PR back to stock

Sorry if this has been answered somewhere, I haven't checked any of these threads for a while so lots of info to sift through so might have missed my answer. I'm dusting off my LG G4 that I screwed up rooting and had to flash the Puerto Rico img. It's slow, buggy, and that green spot issue sucks. I'd like to go back to stock so my question is:

1. Can I use this method to go back to stock without bricking my phone?

Model Number: LG-H810PR (was originally a US LG G4 phone)

Android Version: 5.1

Kernel Version: 3.10.49

Software Version: V10a-310-410

2. If I can, would I be able to root after going back to stock? If so, with what method?

Thanks in advance for the info. Much appreciated.
[AT&T LG G4] alpha04001:
guys i need help, i was updating my lg g4 with h81020n from this https://xdaforums.com/att-g4/general/lg-g4-h810-upgrade-to-android-6-0-t3323995 but then my device go into bootloop. i was able to enter the download mode and try to get back to 10o using this tot method, but the flash tool showing error "Download Fail!! (2 Sec)" what did i do wrong?

update:

i was managed to update via LGUP and the process show 100% complete but my device still keeps on rebooting. i really need help..
[AT&T LG G4] hyelton:
Are you sure you have an H810? Where did you buy the phone? Did you buy it directly from AT&T? Or did you buy it used or referb?
[AT&T LG G4] alpha04001:
I bought it refurbished from a seller that got it from Vietnam I guess... I think it was legit h810 since it got so many at&t bloatwares and the software information shows h81010o version.

Now this is what happens:

My wife put the device on the floor, she said maybe it was overheating, I'm a little skeptical about that but guess what the stupid thing worked again.

I'm not sure what caused it but I'm a little worried it will go bootlooping again. Any suggestions?
[AT&T LG G4] hyelton:
Yeah it would have bloatware and apps as somehow they load the att firmware on it. But when updating or changing firmwares is when it will be noticed, it’s sadly common.

If it finally booted up after boot looping after flashing then you have a hardware problem. Just google LG G4 bootloop. It’s extremely common hardware issue. I’d never recommend the phone to anyone. Even if you bought a brand new one you’d still be subject to the bootloop failure.

Just always store everything on an MicroSD card and never anything important. It will happen again, only solution is a board replacement. There are some fixes by taking apart the phone and modifying the heat sink etc.
[AT&T LG G4] alpha04001:
yeah there's a lot of people having hardware issues and many people suggest to bake or iron the damn thing. but the refurbished price is so tempting in my country its only about $92 for a flagship specs and a very neat design. i will try to have the device replaced by the seller.

thanks a lot for the advise though..
[AT&T LG G4] urundunus:
hello, i bought a h810 last week and after installing greenify i cannot access security settings to clear credential storage, everytime i try to uninstall an app the phone reboots, etc. I updated it to h81022f when the problems started,now i wonder: is it possible to downgrade to the first MM version? i read a lot about the antirollback thing but i dont know if that applies to MM downgrade to MM
[AT&T LG G4] hyelton:
It's not related to the app. You have either a different model that's not an H810 that has H810 software on it. And or its hardware failure. No solution other than a board replacement for that. Sadly it's common.
[AT&T LG G4] urundunus:
its funny, i remove de back case and in the upper right it says h811, how the hell they flashed the h810 fw on it? i assume its unlock bootloader there isnt any possibility to flash another fw?
[AT&T LG G4] hyelton:
I’d return it. Means it’s got binned parts They do it somehow but it’s unreliable and common.
[AT&T LG G4] mails2safeer:
LG Flash Tool App doesnt work for me!

I was trying to Update my H810 to MM, But sadly i am on older H81010l version, so i have to flash H81010o first before doing MM update, so i tried this, exactly as described in this tutorial, but i couldnt run the LG FLASH TOOL app on my windows 10 pro, it gives "ordinal not found error, The ordinal 7118 could not be located in the dynamic link library C:\LG\LGFlashTool.exe" :eek::eek:

any help will be appreciated
[AT&T LG G4] hyelton:
Why not ota update if your on AT&T?

No clue on that error that sounds like an issue with your install of windows. Might be best to try another computer.

If you bought the phone used or refurbished and not directly from AT&T make sure you have an actual H810 by taking a look at the motherboard.

I wouldn’t suggest updating anyway as it seems to cause nothing but issues on the AT&T model even the legit ones.
[AT&T LG G4] mails2safeer:
I’m not on AT&T, it was a used one. So I wanted to update to MM.
[AT&T LG G4] maxusTHANATOS:
i would like to take a little bit of your time please

i just bought LG G4 it looks new in its box and stuff, but i have a feeling that the seller upgraded the phone or something, i don't trust them

Phone Info: H810 with an H81020o Software version and 6.0 MM android

i want to know if my phone has been upgraded or still in stock firmware, is there a way to know, and are there some phones who comes with android 6 in the first place, because i'm planing to get it back to stock because i can't OTA update like a normal phone and it's bothering me

and also there's that weather app that i can't download, giving me unknown error -99930

i mean a new phone shouldn't have issues like that, what do you suggest me, you're the expert
[AT&T LG G4] hyelton:
It’s most likely not new. Nor is even an H810. Not sure what you mean by upgraded? Unless your mean tampered with.

What happened when you go to settings and try to add a lock screen password? Does it let you?
[AT&T LG G4] maxusTHANATOS:
i meant by upgraded, updated from lolipop to Marshmallow

what do you mean not an H810, it's shown in about phone, is it possible that u can make it fake? and why, and i'm sure it's AT&T, i can see the logo in the beginning

and yes it's letting me set password in the lock screen i have a knock code now set up

thanks a lot for replying!
[AT&T LG G4] hyelton:
It’s extremely common to either get a used /binned parts G4 sold as new. OR used/binned parts phone and it not be the correct model, this has been a problem a few months after the G4 first came out.

About phone and software mean nothing. As it is running H810 firmware. And usually a user won’t notice until they update the software and or later down the line run into software issues.

Only real way of knowing the model is taking the phone apart.

Is it running the latest software? If not updated it that can break things if it’s really not an H810.

Yes the phones can come refurbished and be updated (like from LG when someone warranties one). But can’t say updated when it’s new as I don’t think LG is still making the phone due to the boot loop issues with them.

Do you mind me asking how much you paid? Honestly to me the G4 even new wouldn’t be worth more than $100 just due to the issues and risk with them.
[AT&T LG G4] maxusTHANATOS:
damn that's dirty, i hate this, guess i'll never know the model better not try anything that may break it

i don't know if it's the last software, it's shown that Software version is H81020o

the weird thing is i can't find that Software version in the official website

i paid $200 from morocco

the seller said it's never been used it's still new he didn't mean that LG still making them he just meant that no one has ever touched it
[AT&T LG G4] hyelton:
Yeah it’s terrible. In the US anyway unlocked G5s can be gotten for around $150 used.

I’d honestly return it for that price if you can. It’s not a reliable device, the G4 wasn’t even reliable when it first came out. If you know about the boot loop issues it’s extremely common
[AT&T LG G4] maxusTHANATOS:
yes i searched for it and i know, too bad i really like the UI and screen quality

well i'll try to convince the seller to return it and get something else instead even tho i'm not sure he will because there's no guarantee, getting my money back is not an option that's for sure

i should have searched before i go ahead and buy

anyway thanks a lot for your time, i appreciate that
[AT&T LG G4] Shefik007`:
Hi Hyelton. Can I downgrade from Android 6.0 by your method? Will this not brick my phone?
[AT&T LG G4] glenrocks:
G4 H810 H81021y <SDCard format stuck on 20%> fails to show up

I have locked AT&T phone shows corrupted SD Card <SD card is corrupted..Touch to fix> - which then fails to format (stuck at 20%)

I am using H810 with sw H81021y 6.0 MM.

How can I manually fix the mount issue?

Regards!!
[AT&T LG G4] hyelton:
That sounds like an issue with your SD card, have you tried another SD card?
[AT&T LG G4] glenrocks:
For other users having same issue:

I still have not tried New pre-formatted SD Card yet. If anyone has, let me know if it was resolved.

I will update this thread when I do.
[AT&T LG G4] SAMOANBK47:
Fail

So I've tried this method a million times and I keep getting stuck after 2 seconds it says download fail open packet error! Please any help would be much appreciated.
[AT&T LG G4] hyelton:
Your using lgup correct? Your not trying to downgrade right? And your using a usb 2.0 port?
[AT&T LG G4] SaqibxNaeem:
my sim is locked after installing the software now what do i do.
[AT&T LG G4] hyelton:
Doing this doesn’t unlock nor will it lock your sim slot.

What’s your model?
[AT&T LG G4] SaqibxNaeem:
My phone was working fine before software now i have changed the motherboard of the mobile due to sim lock.
[AT&T LG G4] totaman:
Figured as much, and I was just was being lazy about it. lol

Guess I will do a titanium backup first and then follow the guide. I appreciate your help!
[AT&T LG G4] hyelton:
Yeah I understand that haha. But it's always good to start fresh sometimes anyway :). Your welcome.
[AT&T LG G4] RedditMessedUp:
Will this work on 10i? I have yet to find anyway to unroot my phone.
[AT&T LG G4] warri:
This will take you from 10i to 10o. This will unroot you, and wipe all your data, and upgrade your firmware to 10o.
[AT&T LG G4] warri:
Thanks Again for providing this. After Editing my Build.prop (LCD Density to 540) my phone decided not to boot. Used this Method to bring me to Stock H810o...Time to try out Stock LG for a little while, while I re-setup my phone :(....I miss Nandroiding
[AT&T LG G4] faizalotai:
Why not using adb method...

adb shell wm density 540 && adb reboot
[AT&T LG G4] smknutson:
Would this be required to take a future MM upgrade?
[AT&T LG G4] warri:
If you are rooted, then you will most likely need to use this to go back to stock before you can take an ota to M
[AT&T LG G4] smknutson:
And has there been any discussion on having used a rooted system image and the future ability to upgrade? Even if back to stock?
[AT&T LG G4] hyelton:
Well you can't take an OTA update if your rooted or have a custom recovery.
[AT&T LG G4] nghiacbg:
i cant change GSM, CDMA and LTE in this ROM. where is it?
[AT&T LG G4] hyelton:
AT&amp;T H810 Back to Stock Guide (TOT Method)

This is not a rom, These are STOCK firmwares. AT&T firmwares / modems have never allowed changing it in the last several years on phones.
[AT&T LG G4] nghiacbg:
but i cant change to CDMA this mean i cant use mobile data. Only use wifi network ?
[AT&T LG G4] hyelton:
Huh? The H810 is a GSM phone not a CDMA phone.
[AT&T LG G4] nghiacbg:
My god. Come back to g3 now. Disappointed with g4
[AT&T LG G4] itiskonrad:
If you're talking about the menu that allows you to select gsm/wcdma/lte, you have to edit build.prop and change ro.build.target_operator from "ATT" to "OPEN". This will bring back the menu to select network mode, as shown in the attached picture.
[AT&T LG G4] spdwiz18:
[MENTION=2684188]autoprime[/MENTION] A what might be stupid question. Per this post

81010E is version 1. I did *#*#244773825625#*#* and it still does not show an anti-roll back version. So (I) assume that i'm still on V0. Therefore, am i correct in that i should not use this tot to return to stock as i would want to keep my V0?

any help would be greatly helpfull thank you
[AT&T LG G4] nghiacbg:
my device is not root, can i edit build.prop? and how?

sorry im newbie :)
[AT&T LG G4] hyelton:
You must be rooted to edit build proo
[AT&T LG G4] autoprime:
10E is v1. I would not rely on a hidden menu unless the menu actually had the antirollback section in it and said 0. no menu doesn't mean no antirollback.
[AT&T LG G4] Xx_xBLADEx_xX:
[MENTION=2607037]hyelton[/MENTION]

Thank you! A few months back I had returned to stock using the H810PR KDZ as I was not happy, lost interest and decided to check the forums tonight. Glorious stock at its latest and greatest.

I have not had issue with this phone but quickly gave up with the lack of support, but now that I am back to proper stock I can at least hope again.
[AT&T LG G4] xDEMON87x:
any mirror for the tot file? its reallllly slow
[AT&T LG G4] hyelton:
Are you using a download manager? If not use a download manager it will most likely help you big time. The files are hosted on my server, everything seems fine at the moment. Theres already 2 links on 2 different servers Did you try both?

See screenshot.
[AT&T LG G4] xuanphucn:
Can I flash my phone back to lollipop this way after taking marshmallow update?
[AT&T LG G4] smknutson:
Tried to flash to stock, Google locked me out, can't log in to Google account on phone for three days, if it still doesn't work I have to send it to lg. Be careful.
[AT&T LG G4] hyelton:
That's normal.. Google will only "lock you out" if you enter your login incorrect several times.. It's with any new device not just LG. it's security. Flashing back to stock doesn't cause it, it's when flashing back to stock before first resetting your device from the settings menu. If you don't know your google login you won't be able to use the phone again, unless lg will warranty it.
[AT&T LG G4] smknutson:
I entered the login correctly, it's just kicking me back to the enter email page. Both Google and lg said it is the 72 hour device protection lockout.
[AT&T LG G4] hyelton:
Strange. Cause that only happens when you incorrectly enter info. Never seen them do that otherwise.
[AT&T LG G4] smknutson:
Which is why I think lg said they will warranty it if the lockout seems to be permanent. I tested it with a deliberate incorrect password and it gave the incorrect alert, so I had it right
[AT&T LG G4] hyelton:
Sorry no clue yet as not sure who has done it
[AT&T LG G4] smknutson:
Just to update, I am back in my phone after three days. Thanks Google for locking me out of my own phone. Really crappy part is according to Google there is no authentication or verification you can go through to immediately bypass it. Outstanding.

Be careful guys, DO NOT change your password within three days prior to doing a factory reset...
[AT&T LG G4] hyelton:
Glad you got it! Just a tip of possible performing a factory reset via menu and then flash will avoid the Google login stuff.
[AT&T LG G4] InflatedTitan:
does anyone this hosted on a different site? its telling me i have 12 hours left.. i need my phone back asap... its giving me a lgsetupwizard has stopped again.....