yashsingh1/xdaforums huggingface dataset:
[G4 Android Development] doomalikaw99:
When you downgrade,a factory reset is done automatically.

Don't worry about your contacts,they are probably saved on ur google account or sim card.
[G4 Android Development] doomalikaw99:
Just to ease my mind,I'm in constant fear,has anybody re-experienced the bootloop after enabling the 4 cores?
[G4 Android Development] Abdl:
i also like to know this.

Also,any significant decrease in performance that could be a deal breaker?
[G4 Android Development] doomalikaw99:
With 4 cores enabled,no there's no significant decrease in performance,its amazing!

But with 1 core its **** :P
[G4 Android Development] kacarot:
Good companions.

Here to sign a petition for a global solution to the G4.

Distribute the link in your network.

More people together, more pressure for LG and bootloop.

Thank you.

https://www.change.org/p/lg-mobile-...e-lg-g4s?source_location=petitions_share_skip

Idea: Could I add link Change in main post.

Enviado desde mi LG-H815 mediante Tapatalk
[G4 Android Development] arvarobert:
Done!
[G4 Android Development] ajieboy:
Hello

1. i watched the first video in the youtube and still can not find the tutorial and URL to download the file. it would be great if you write the simple step, including the file name or URL to download, in the first post.

2. my LG G4 is MM. if i downgrade to LL, will my data/photos be lost ? if my data/photos not lost, i will downgrade from MM to LL and do the fix

Thanks in advance
[G4 Android Development] blueeyeblue:
[MENTION=2493083]ajieboy[/MENTION] - Everything is explained in the video's description.
[G4 Android Development] toybxb:
Done !!! :cool:
[G4 Android Development] nipun1110:
[MENTION=3247693]blueeyeblue[/MENTION] successfully unbricked my H815T. I cannot express enough my gratitute to u. And yes I will donate after I become a little free from my job. All the best wishes to u my brother.
[G4 Android Development] nipun1110:
Anyone having any weird trouble after unbricking yr phone i. e. Automatic random startup of apps
[G4 Android Development] itm:
I know I'm probably being dumb here, but can anyone point me to a download link for the 4-core fix?

Also, can the 4 core fix app be uninstalled after the 4 cores have been enabled?
[G4 Android Development] blueeyeblue:
[MENTION=390803]itm[/MENTION] - Hi, here is the video link: https://www.youtube.com/watch?v=-NziX5Fyq58
[G4 Android Development] itm:
I saw the video - it's the link to the 4 cores fix app download that I was looking for??
[G4 Android Development] kacarot:
But as I see the fix for 3 core, is that correct?

Anyone have experience if this saves battery?

So far few normal use not notice performance drop ...

Thank you

Enviado desde mi LG-H815 mediante Tapatalk
[G4 Android Development] WTF?:
what happened to the heating up (reballing) of the main two cores, with a hot air rework station, to fix the phone completely?
[G4 Android Development] tbmoc96:
Hopeless LS991

[MENTION=3247693]blueeyeblue[/MENTION] Please help me!!! I'm using Sprint G4 LS991 and I cannot use the given TOT files to get my phone out of ILAPO. I'm using ZV6, 5.1 android version, rooted now. Somehow luckily I got it succesfully boot 1 time and I tried to use Kernel Toolkit to disable cpu4 and cpu5. BUT when I got a phone call, the phone started to heat up after 3 minutes of calling. Since then i can't boot up my phone. I also tried to edit the TOT file using Winhex, please see in the picture, after that I got the error. Some people confirmed that they successed in recovering their F500x phones by edit the TOT file by replace 2 first H815 lines to F500.
[G4 Android Development] sunster:
Strange didn't work for me as it still shuts down. And a bigger headache is that i forgot to change it to upgrade and now all my data is lost. Any solutions anyone or am i SOL?
[G4 Android Development] InfX:
First, thanks for posting this, I've been able to backup the data with TWRP, running on a single core. Now, i'd like to try & RMA the device, and the question is, how do i revert and re-enable all cores at boot, as it normally should be (so i get the boot loops again)?
[G4 Android Development] doomalikaw99:
Reflashing system image should probably work.
[G4 Android Development] InfX:
Didn't try that yet, hopefully it would work indeed. I'll obviously flash a stock kdz in "refurbish" mode, last thing i want is some bored guy at the lab extracting sensitive stuff (such as passwords and session keys) from my data just because he can. Thanks everyone. Wish me luck with RMA :(

Note to self: edit my XDA profile (i am no longer in Israel, nor on Golan Telecom, nor on Galaxy S3).
[G4 Android Development] MountainX:
Same here. No problems.
[G4 Android Development] InfX:
Did you RMA it at the place you've bought it from, or did you go directly to LG? I am planning to go to the B&H, the place I've got it from.
[G4 Android Development] MountainX:
T-Mobile would not warranty it because I rooted it. LG took care of it for me without any problem. Great customer service from LG!

I'm told that the only way to get it fixed properly is to send it back to LG. If you go to B&H all they can do is swap it out, and you have a chance of getting another one with the problem. When I spoke to LG they told me that they are confident their repair process will solve the issue. (We'll see. I just got it back today.)
[G4 Android Development] InfX:
How long did it take? Also, does LG have some network of service centers one can drive to, or does one have to mail it in? (Something i have yet to learn how to do, never mailed anything in US).

And, true, B&H can only swap it out , but i'd settle for that, since that is pretty much immidiate (i live 30m by bus from NYC). Do you trust LG rep promises? I know i dont. Look at that ppt file, look at the date there. They KNEW, pretty much fom the very release of the device!!!
[G4 Android Development] MountainX:
LG received it from me on Aug 31 and I received it back from LG on Sept 3rd. Really fast!

What ppt file? Do you have a link? Even if they knew months before the release, I doubt there is anything they could have done as you have already built the phones by that point. However, I'd like to read the ppt to see what the facts are.

Here's a link for you. Or you can call LG. I spoke to a really helpful guy on the phone when I called.

https://lgmobilerepair.com/request_repair
[G4 Android Development] InfX:
There is a ppt inside the zip with the core disabling tot files. One with the instructions about flashing those files. There is a date in it, inside the presentation, as text. Don't have the link handy, i am in my bed with a tablet, just look at the first post here. Sorry.

And thanks for the link to LG!
[G4 Android Development] MountainX:
I don't see anything except 2 videos in the first thread and the videos don't explain anything to me.

I see several people asking for a download link with no replies. This is a very confusing thread.
[G4 Android Development] doomalikaw99:
Check the videos descriptions!!
[G4 Android Development] MountainX:
I don't get any video descriptions at all. Nothing. Anyone have links to the videos on Youtube?
[G4 Android Development] doomalikaw99:
https://youtu.be/lbJXwPmbXFc

https://youtu.be/-NziX5Fyq58
[G4 Android Development] InfX:
In the comments section of the first video there is a link to the tool:

http://odkaz.youber.cz/lg-g4-tool

There is an LG flashing tool inside, a set of .tot files for different devices, that disable all but one core, and a .pptx file with instructions, describing how to flash it. There is a date inside that .pptx, on the first slide, "26th November 2015", and the second slide mentions its the 3rd revision of the document, first one dates "12th November 2015". Apparently this is for "LGE Internal Use Only".
[G4 Android Development] MountainX:
Thanks! Why hasn't someone just posted all that info (from the video descriptions) into this thread? Unless there is some reason not to, I'll do it. But this thread would be much better if it was just posted into the first post.

All the detailed info is obscured there in a video description when it should be in a post here.

---------- Post added at 01:10 PM ---------- Previous post was at 01:07 PM ----------

Thanks. I see. But this tool was not developed specifically to fix the boot loop problem. It appearsa to be a general testing and debugging tool. So I think it is wrong to make a conspiracy theory based on that date. Just my opinion...
[G4 Android Development] InfX:
The OP is probably trying to get the most views on youtube, hoping to cash it or something. Obviously, if thats the case, and if he asks to remove the link, i will (although, it is going to get lost in comments a few days from now).

The flasher is general, indeed. But the .tot files and the pptx guide are VERY specific.

And guss what... i went to B&H, hoping for a swap, only to get told they can send it to repairs, and that its gonna take 4 to 6 weeks :(

The LG link posted a few posts above doesn't even have the H815 listed, i guess this is because the H815 normally isn't intended for the US market. I took the LG phone number for B&H, but thats a stupid voice bot phone, that eventually guides you... to the same web site!

PS: i am ****ed :(
[G4 Android Development] InfX:
Some update on my boot loop story... I've contacted LG (by live chat), and they are ready to replace the defective phone for me, but...

They are only willing to provide a CARRIER LOCKED variant, locked to the corresponding carrier, telling me i can go to that carrier and get it unlocked. I've requested a T-Mobile variant (H811), although, i feel like i am in for a long and irritating arguments with T-Mobile after i finally get it. Any attempts to convince the LG rep i should be receiving a SIM-unlocked replacement failed miserably.

Just FYI, to anyone reading this thread :(
[G4 Android Development] EddoWagt:
Shouldn't you get the same version you already have?
[G4 Android Development] InfX:
I though i should, but apparently not :(
[G4 Android Development] SLIDER_PRIME:
G4 H818P no root, updated to MM, went completely dead no boot loop, phone started after being in the freezer for 4 hours after a week of not being used and then quickly went off dead again.

Anyone knows a way for data recovery at least ? thanks.
[G4 Android Development] blueeyeblue:
[MENTION=524200]SLIDER_PRIME[/MENTION] - Have you tried the baking method?
[G4 Android Development] mtillapa:
After ILAPO bootloop solved

Started out with bootloop problem running software 20g on LG G4 H815. Reverted to Lollipop, v10d, using LGUP and applied the TOT fix which turned off the big cores. Installed TWRP, rooted phone and ran fix that turned on 4 of the 6 cores. Phone has been running decently since then. However, whenever I try to boot into recovery, TWRP, either using TWRP Manager, Quick Boot, or Power and Up Volume key combination I always get a notice that Fastboot mode has started and it seems to hang there not completing the opening of TWRP. I can only get into TWRP by attaching the phone to my computer and starting fastboot mode from there and running TWRP through fastboot. Any suggestions.
[G4 Android Development] ObiDanKenobi:
you are almost there: after you started TWRP through fastboot, in twrp you should flash the twrp image as update to recovery, this should stick the recovery to twrp.
[G4 Android Development] mtillapa:
Thought that I had previously done that but just to make sure I just redid that and I still get the same result as I described in my original post, with both TWRP Manager and using hardware buttons.
[G4 Android Development] zavorrax:
So the fix is about disabling the two most powerful and power hungry cores, right?

How do this impacts performances? What apps can't you no longer use (smoothly enough)?
[G4 Android Development] ObiDanKenobi:
Indeed, that is the fix. I cannot tell you how the phone will feel, but it will certainly feel better than a brick on your desk (in case you had no warranty). I do not expect to feel very slugish, if all 4 small cores are activated. Maybe you will feel in games and or navigation apps, that are also quite intensive.
[G4 Android Development] qiuness:
I bashed my head against this problem as well..

To get into TWRP, just boot into the old recovery (vol down + power, release power, push power again).. The white recovery appears.

Select YES and YES, then TWRP boots

Now to my question:

I successfully disabled the 2 cores, but now i wanted to install a newer rom: Genisys Rom 4.7

It installed, booted, but i've not been able to install the FIX again.

Whenever i try to turn on unknown sources, the settings crash, and then i rebooted and it bootlooped again.

So my actual question is:

Does the fix also work on 6.0 or just 5.1?

Is there anything i should be aware of?

Also is there a way to install the fix from recovery?

Thanks
[G4 Android Development] mtillapa:
As I previously stated TWRP does not boot when using the (vol down + power, release power, push power again) just the following appears on a black background

(In red text)FASTBOOT MODE

(In white text) PRODUCT_NAME - msm8992_p1_global.com

(In white text) VARIANT - msm8992_p1_global.com Toshiba 32GB

(In white text) HW_VERSION - rev_10

(In white text) BOOTLOADER VERSION - N/A

(In white text) BASEBAND VERSION - N/A

(In white text) CARRIER INFO - N/A

(In white text) SERIAL NUMBER - LGH815e#######

(In white text) SIGNING - production

(In white text) SECURE BOOT - disabled

(In red text) LOCK STATE - unlocked

(In red text) [17370]

(In red text) [17420] Fastboot mode started
[G4 Android Development] alnoerman:
tks for tutorial. i have h815 lock bootloader, is it work for my device ? my device always reboot automaticallly and overheat.

tks for guide

:good::good::good:

Please note: This method is only good for recovering all the important data or selling the device, since a friend of mine got the bootloop even after using the ILAPO fix.
[G4 Android Development] doomalikaw99:
3 months in and phone is still running very well with the fix.

I'm starting to feel like this fix is permanent,anybody thinks otherwise?
[G4 Android Development] alnoerman:
Halo... Is it work for h815 lock bootloader?
[G4 Android Development] doomalikaw99:
You have to unlock the bootloader from lg official site.
[G4 Android Development] alnoerman:
My device h815 SAE.. can't unlock bootloader.. the lg official site rejected
[G4 Android Development] qiuness:
still not sure if we can flash roms newer then 5.1 (ex. 6.0)?
[G4 Android Development] zuqka10:
App is locked and requires $25? Is there any way around?
[G4 Android Development] mtillapa:
An update. After I noticed that the version of TWRP I had been flashing, twrp-3.0.2-1-h815.img, after initially using fastboot to boot an earlier version, twrp-3.0.0-0-h815.img, TWRP image file, was half the size of any of the earlier versions, I decide to flash the 3.0.0-0-h815 version and TWRP seems to boot just fine. Seems as though there is something wrong with the latest version.
[G4 Android Development] zuqka10:
There is of course a way around and found it myself after the author didnt want to go past $20: install kernel auditor and enable all 4 big cores and tick em enable at boot and you are set.

We should yet credit the good guy and donate whatever we can!
[G4 Android Development] polfrank:
Can't we modify a MM rom to boot with only 1 or 4 cores?
[G4 Android Development] blueeyeblue:
[MENTION=4722961]polfrank[/MENTION] - It may be possible. Probably CM kernel?
[G4 Android Development] zigiz1:
If You get root and instal busybox, this fix works. I have locked bootloader H815 TWN with root and busybox, it's works great.
[G4 Android Development] NaughtyDescent:
Brother in my country Paypal doesnt work. can you make excepton for me plz, I just bought this phone few weeks ago and it get me this. :/
[G4 Android Development] hussain ali khan:
install kernel auditor and enable all 4 big cores and tick enable on boot and you are set
[G4 Android Development] darkriff:
It will do the same function as ilapo?
[G4 Android Development] ObiDanKenobi:
Yep, exactly the same

Trimis de pe al meu LG-H815 folosind Tapatalk
[G4 Android Development] blueeyeblue:
[MENTION=4660287]NaughtyDescent[/MENTION] - Could you please ask a friend or anybody else who has access to PayPal, please?

[MENTION=4826762]darkriff[/MENTION] - Kernel Adiutor (ROOT) does not work the same way. It is a little different.
[G4 Android Development] gallego18:
I am asking the same, should modify a kernel... i dont know how edit-create kernel, but i think that it can be possible, a MM kernel with big cores disabled.

The problem with kernel adiutor is that we reboot our phones, the changes apply after the LG appear... and so in case of bootloop..not work.

Sorry my bad english
[G4 Android Development] Slapiukas:
What if you disable big cores at boot and when you are in a rom, enable those big cores. What would happen ?
[G4 Android Development] InfX:
You will get the same crash either the moment you enable them or the moment a load is placed on them. Feel free to try :)
[G4 Android Development] rockyjacky:
I am also looking for the same
[G4 Android Development] gallego18:
No, because ilapo works with 1 or 4 little cores since you turn on the phone, since init.

With kernel adiutor if you check "set on boot" it disabled cores once the phone enter on android. So, the bootloop issue cant be fixed with kernel adiutor, because the big cores should be disabled when the LG logo appears.

I am trying modify a kernel to boot only with 4 little cores but i am a beginner and dont understand so much.
[G4 Android Development] pablomc90:
Hi all, i am from Argentina. I have a lg g4 with bootloop and i want repairt it. But i am no be good with english and it difficult more to problem. I have any problems. My lg g4 is h815, it have a MM android, i try downgrade to 5.0 with ROM KDZ and apply archive .tot for 4 cores on but it no up. I read your post and i download a archive rar (7_HD_5.0_H815_by_S3V3N), i want use it for downgrade but i no know how apply it? i read here that can use 2 method:

1- TWRP but for it need more know and more hard.

2- Flash only the system parititon using the send_command utility. Any post where i can find how to do that?

Sorry for my english, it is bad.

And thans you for help.
[G4 Android Development] blueeyeblue:
You can follow the tutorial when you click on the button (if you are not rooted yet) in the 4CORE FIX App: http://odkaz.youber.cz/lg-g4-app
[G4 Android Development] Akhayev:
Guys i have two lg g4s and model number is H815p and both of them out of warranty .. And to replace the motherboards i have to pay nearly 250$ each .. So is there anyway to make this guide work on my phones ?
[G4 Android Development] doomalikaw99:
Blueeyeblue mentioned in page 6 to hex edit the H818p tot file to support the H815P,I don't not know what or how but I thought this might help you.

Good luck!

An update to whom is interested: I have been using the 4 core fix for five months with daily usage now without problems!
[G4 Android Development] Akhayev:
Okay thank you very much i will try it
[G4 Android Development] mcgoxel:
Hi

Does this mod works succes with t-mo h811 ?
[G4 Android Development] Akhayev:
Guys another question .. i did everything and the phone worked.. now can i update to marshmallow and do whatever i want or the phone will go into boot loop again?
[G4 Android Development] mtillapa:
Bootloop will return
[G4 Android Development] blueeyeblue:
Guys, new revision v8.0 has been released. Enjoy full Marshmallow and other devices' support as well ;)
[G4 Android Development] blueeyeblue:
[MENTION=5537575]Akhayev[/MENTION] - H815P is fully supported in new version. Also Marshmallow OS is fully supported as of now.
[G4 Android Development] atoml:
Does not work for me. I am using H81520g

I get "secure device but unsecure image"

Edit: H815P worked for me. THANK YOU
[G4 Android Development] Akhayev:
Guys i did everything and now the app asking me to pay 25$ ..if i paid and got the phone work properly after that can i use my phone normal ? Like flash ROMs and update to marshmallow and these stuff ?
[G4 Android Development] mtillapa:
New version available?

And just where is this new version obtainable from?
[G4 Android Development] obvious:
Secure device but unsecure image. H815 base rom 20i
[G4 Android Development] NaughtyDescent:
There is no root available for marshmallow yet.... how can we re enable 4 cores as your tool require root access too.
[G4 Android Development] Stadller:
Root is available for both Marshmallow and Nougat. Just flash SuperSu 278sr5 :)
[G4 Android Development] Stadller:
I tried to download, but the link (and apk) still say v1.2

If there an alternative location or mirror to download v8? Thank you :)
[G4 Android Development] NaughtyDescent:
can you link it please?

---------- Post added at 01:14 PM ---------- Previous post was at 12:25 PM ----------

I think I'm stuck on lollipop now. as there is no support for unlocking bootloader fo rmy model i.e. H818P so i cant root marshmallow :(
[G4 Android Development] Stadller:
Supersu is available here on XDA, just search (cannot link anything yet, sorry)

I don't know if FlashFire is available for you specific G4 model... WWith FlashFire you can flash things with a locked bootloader (at your own risk)...
[G4 Android Development] ObiDanKenobi:
Until you are rooted you cannot flash anything
[G4 Android Development] Sunrise2000:
I choose tot file from Lollipop folder and installed successful, phone reboots and still lg logo and in left top corner flashing blue indicator and that's all... wont boot up android fully.

When I choose tot file from Marshmallow folder, start install and installation stops at 9%, pop up error: 0x2000 secure device, but unsecure image. What's wrong??? Please help
[G4 Android Development] pok5:
Your program is really close to scam, because everyone can re-enable cores with simple use of Google Play app such as Kernel Aduitor which is FREE on Google Play. In comparison to your 'solution' for 25 Dollars which you are calling 'donation'. What kind of donation it is when you set a price of 25 bucks and made it obligatory? In Kernel Audiutor there is an option to even launch cores just after phone booting (your app even in this point is not unique) If someone is afraid to use cores on full speed there is an option of underclocking like in every kernel adjustment program. By the way you should make it clear in your videos that your app is not for free.
[G4 Android Development] NaughtyDescent:
He is trying to earn something from here. To me I think he can make a fix by which only big cores get disable and rest quad core keeps on working but he is disabling rest 3 cores intentionally so that we have to use his app after donating 25$ which is still impossible because dual sim variant can't be rooted yet (If I'm not wrong). I can be wrong as I'm not a developer but such things comes in mind when you see such developments. Soon someone will find a way to root MM on dual sims without unlocking bootloader and we can rock MM on faulty G4 with Big cores disabled.
[G4 Android Development] superandroid2011:
I second that!

I did everything and download his apk only find that is not donation, is pay do use, you can't use the app without paying those $25, which is too much by the way.

A forced donation is not a donation at all.

Be a man, be honest!

Ended up using Device Control to enable 4/4 cores (every reboot).
[G4 Android Development] hochocnua:
I know if it wrong, my g4 is H818p without root because lock bootloader.

Do you flash SuperSu on what name of G4 ?
[G4 Android Development] NaughtyDescent:
You can not unlock boot loader on any g4 other than h815. So Sony even try to do so.
[G4 Android Development] Brontok:
One question, are we paying 25USD for the app that disables the two cores, or the one that make the other 4 work ? I`m on MM, still havent faced this bootloop issue. How can I prepare myself, unlock the bl, root, install twrp and wait to see what happens ? :) Btw my phone model is h815.
[G4 Android Development] doomalikaw99:
What disables the the 2 cores is from lg,the app that enables 3 more cores is from his(that now cost 25$).