yashsingh1/xdaforums huggingface dataset:
[G4 Android Development] DesertHawk:
I flashed the MM H815p on my H815 which worked. However my 4 cores still worked without me having to install 4 core fix. I then flashed stock KDZ and I'm back on hexacore. If the cores go again Ill go back to 4 as that's enough for me anyway... I don't play games on my phone.

Ill attach screenshots when I'm home
[G4 Android Development] jafferkhan:
Guys.. I can't even turn it on... Strangely I tried to put it in the freezer once and it got to the boot loader screen with an exclamation mark... But then turned off again...

Any help would be appreciated. I've got the international version 815
[G4 Android Development] Slapiukas:
Maybe the battery is faulty idk
[G4 Android Development] blueeyeblue:
[MENTION=6339306]Slapiukas[/MENTION] - It may be a battery problem, yes. Please try a different battery, so that it charges to a sufficient level.
[G4 Android Development] bailong:
Ok i have found this method, because mine is H818N : https://xdaforums.com/g4/general/unlock-bootloader-h818-t3564238

How can i do it if my phone is in bootloop? For rooting my phone, i need to be booted on the OS?

Maybe you have a better tutorial?:confused::confused::confused:
[G4 Android Development] blueeyeblue:
[MENTION=613965]bailong[/MENTION] - You can follow the tutorial. The link you have provided us with can be achieved by using the send command utility - if done properly.
[G4 Android Development] ediktepe:
i have LG G4 T-Mobile(H811) with bootloop. the same problem. i'm using cm13 marshmallow custom rom. installed ilapo but it wants 25$. I will pay if it's works for me but i'm not sure to pay. what happens if it isn't work on my phone? will you pay my money back if it isn't work?

Edit: Is it a permanent fix for bootloop?
[G4 Android Development] bailong:
As the phone is only in Bootloop , i can only put it in Download mode. Other modes are not working.

In download mode, we i try to associate the phone with adb, it is not working. Plus the thread is closed now :crying:
[G4 Android Development] vancevaldivia:
lgup

Lgup is forever initializing what to do?
[G4 Android Development] Sunrise2000:
Another question: I tried to flash mm rom via lgup.. seems fail because when phone restarted, got bootloop. So I flashed recovery tot file (LL version) and phone works.

How to upgrade to MM with 4 CPU cores only, OTA update service seems disabled?
[G4 Android Development] blueeyeblue:
[MENTION=7695250]ediktepe[/MENTION] - The refund is possible, if the app will not work for you, for unknown reason (which is most unlikely).
[G4 Android Development] blueeyeblue:
[MENTION=4373619]Sunrise2000[/MENTION] - You can try to flash using LG Flash Tool.
[G4 Android Development] Sunrise2000:
I tried. Also got error..
[G4 Android Development] dove_g:
Can anyone test LG G4 with Antutu after ILAPO fix?

What is the result with 1 core, and what is the result with 4core fix? Thank you.

LG G4 has score of 65.000 with all 6 core working, I'm interested to know how much performance are dropped after ILAPO fix,

and if LG G4 is usable after fix.
[G4 Android Development] ^eLipS#:
I wasn't sure which firmware version I had on my phone, so I used LGUP to flash global MM H81520A. It worked, because I've managed to turn the phone on for about 3-4 minutes and check software version. But for some reason, LGUP still detects it as version H81520d. I've tried flashing the kdz file using LG Flashtool 2014, but it keeps failing on step 3, saying it wont connect to the server. When I try to flash the fix file, when it gets to 9% LGUP gives me an error "0x2000 error secure device but unsecured image". And now I'm stuck with no clue what to do... Any advice?
[G4 Android Development] blueeyeblue:
[MENTION=4464178]^eLipS#[/MENTION] - The following error: "0x2000 error secure device but unsecured image" does indicate that your device has anti-rollback flag present.
[G4 Android Development] alitavas:
I had this problem about 2 weeks ago

Fixing steps:

Uninstall LG UP- LG DLL - LG USB Drive

Restart PC

install LG up - LG DLL -LG USB Drive

Open LG UP

Connect your phone

Start flashing

If it won't work do the steps again

Sent from my LG G4
[G4 Android Development] dove_g:
Anyone please can run Antutu test after ILAPO fix (with 4cores fix)?

https://play.google.com/store/apps/details?id=com.antutu.ABenchMark

Thank you.
[G4 Android Development] TheMadScientist:
So i got a ls991 twrp on it with this big core shutdown work for me now?
[G4 Android Development] jafferkhan:
Guys I've noticed something... When I put the phone in the freezer... It turns itself on, with sufficient battery... The phone turns on but there's this download mode showing up... I don't understand how can I get an operating system on it till it remains on... Because after sometime I just dies off.

You think it's the battery?
[G4 Android Development] TheMadScientist:
8

If the device is only coming on on the freezer. More than likely ilapo

A lot of user report only dl mode working. It is a quite odd case. But every one is slightly diffrent.

U can purchase a battery online for a couple bucks 10 or less just to try but i bett ule still send it to lg
[G4 Android Development] jafferkhan:
thanks for replying, that was helpful. The thing is, its now out of warranty, the damn thing bootlooped a week after the warranty was done, and i'm not even in the same country from where i bought it from. Where i am, they refuse to even take a look at it. I've been trying everywhere to see if anyone can do it or get it to turn on so i can install that hack that turns off those cores, but to no avail ...

i managed to turn it on after being in the freeezer but the pc doesn't recognize it, sometimes it does and sometimes it doesn't. then that download mode appears and while the OS is installing, it turns itself off ..

mine is 815, international version btw
[G4 Android Development] TheMadScientist:
waranty doesnt matter even though lgs site says 1 year from what i understand they are and have extended and still repairing out of date now the country thing i dont know about

i know there were a few other post some where too about dismantling the device and sticking paper or somthing in against the core

something about putting pressure on it not sure of the exacts seems kinda dangerous idf it gets to hot catch the paper on fire might try like a thermal pad or something

u might have to go through lg from another country

like stated waranty time is out the door on the g4 because its a very well known hardware issue
[G4 Android Development] jafferkhan:
understandable, still looking for someone responsible to take it to the UAE from where i bought it and get it repaired or replaced, for the time being, I have no plans of going there because of work and stuff like that. its sad seeing a great phone just lying there being useless. it's a great phone and with nougat coming later this year, its even more saddening seeing it like this.

won't buy an LG again
[G4 Android Development] TheMadScientist:
not only is nougat coming we on the locked bootloaders very soon will have twrp and efidroid for multi boot

still have locked bootloader but what almost 2 years and we finally got it

and it works i have the sprint varient ls991 with the betaa twrp on it testing it and its wonderful cant flash boot or recov partitions but i can flash mods and stuff true backups to restore still work in progress but in 1 day 24 hours litreally went from a 1st alpha release to beta 3 so.

other option is to try to find a new motherboard from a trusted source so u know the imei is good and replace it
[G4 Android Development] InfX:
:mad:

It just happened to me! AGAIN!!! On one more motherboard. I absolutely hate LG now.

Let me present my LG G4 time line:

December 2015

I've bought my LG-G4 (H815), factory unlocked from B&H in New York City.

September 2016 (beginning of the month)

The LG-G4 (H815) above goes into infinite loop auto power off. I am flashing the patch from this thread, getting my data, and trying to use the warranty via B&H, that is ready to do this, but tells me they are going to send it out internationally, with the turnaround ETA expected to be 4 weeks. I try my luck with LG USA, they agree to repair the device, but tell me i'll have to choose a US based model instead of the H815. I've chosen the H811, which is pretty close to H815. In the meanwhile, i've deployed my data on my employer-owned exotic version of H815, a Taiwanese version (i think).

September 2016 (almost October)

I've finally got a replacement unit after more than 2 weeks turnaround time. The new unit has been H811 indeed, but to my surprise, the H811 has been carrier locked to T-Mobile. I could never imagine LG would send me a carrier locked device as a replacement for the H815, which is not carrier locked, but they did. I've tried to get T-Mobile to unlock it to no avail, they told me the LG should have sent me an unlocked device, claiming they can't do anything, and claiming i can only unlock the device via T-Mobile if i actually use the device on T-Mobile for 40 days (or was it 90?), or have a $100 total credit recharges associates with it on a prepaid service. LG has claimed the device is carrier locked, and is under carrier control, they are manufacturing it by carrier specs and have no control over it. No amount of ping-pong helped, the device left unlocked. Eventually, they have managed to drive me crazy enough to give up. I took my temporary device (which got a shattered screen) apart, took the new H811 apart, and swapped the motherboards between them, getting an exotic, chimera, but properly operational, intact H815 Taiwanese version, although, eventually, i'll have to pay the employer for what i did.

March 2017 (now)

The H815 board from my temporary device fails and goes into ILAPO again. I've flashed the "fix" again to get my data back and booting the device on a single core at this very moment. I am left with a non-working chimera phone that is obviously under no kind of warranty now, and a working, but T-Mobile locked motherboard i can't really do anything with. Also, i owe one working motherboard of a G4 to the employer (the T-Mobile one will do for this purpose, though).

I am extremely frustrated now and don't know what to do.

:eek:

---------- Post added at 03:59 AM ---------- Previous post was at 03:21 AM ----------

Question to the thread participants:

Does running those phones on 4 slower cores work indefinitely, or do they eventually fail?

​

To those currently using a device 'fixed' this way, how many month do you have it like that?

I want to see if this can be a long term option :(
[G4 Android Development] blueeyeblue:
[MENTION=961092]InfX[/MENTION] - You can check the users' comments yourself: https://www.youtube.com/watch?v=-NziX5Fyq58
[G4 Android Development] InfX:
Comments on YouTube are not searchable, and it would be rather hard to find out someone's report about how long those devices tend to survive. Since you, the OP, respond to me here, i have to note, the way you 'hide' the link to LG's files on YouTube, as well as sending people there (probably to get more views?) is rather irritating. And, your app got a nasty bug in your script, that has previously took me some investigation to find out!!! I've restored the ROM backup (system partition) from ILAPO affected device to an intact device using TWRP, along with the script piece your app injects. Note that it has been long ago, so maybe you've fixed it since then (and i didn't use your app now, on my new ILAPO case, i've just edited the scripts myself), but back then your script would check if your package is present and ILAPO fix was enabled, and then enable 4 cores, otherwise DISABLE 3 of them, IIRC. Guess what, the package wasn't there, i didn't restore the data. And you can easily guess what happened, and what it took to find out.
[G4 Android Development] georgemb:
Is it required both .kdz and .tot file match ? My model is h818p . I was able to downgrade to lollipop 10f using .kdz file and I flashed h818p .tot v10c file... Still bootlooping ...

Bypass tool
[G4 Android Development] NaughtyDescent:
[/COLOR]Question to the thread participants:

Does running those phones on 4 slower cores work indefinitely, or do they eventually fail?

​

To those currently using a device 'fixed' this way, how many month do you have it like that?

I want to see if this can be a long term option :([/QUOTE]

Fixed it and it still working flawlessly since 6 months :D

but I hate it that i cant use it with marshmallow as no root for MM yet. :(
[G4 Android Development] z3r0wan:
LG G4 not booting

Hi! I have LG G4 H815, i was able to fix the bootloop issue using this fix. it lasted for 6 months, and now i'm trying to do it again but it wont let me because i cannot boot to the 'download mode' what seems to be the problem.. i need help.. thanks!
[G4 Android Development] blueeyeblue:
[MENTION=961092]InfX[/MENTION] - I see. I am glad you at least found out the culprit :D

[MENTION=4660287]NaughtyDescent[/MENTION] - I have ordered the brand new LG G4 H815 motherboard (latest revision, b. late 2016). Will let you know whether they use new chip and there is no longer need the reballing or reflow method. That being said, I will tell you whether ILAPO is fixed on the latest board.

[MENTION=4932826]z3r0wan[/MENTION] - You can try to use the freezer method if you really need to restore the data.
[G4 Android Development] InfX:
Ouch, no, you can't "do it again", you do realize what this "fix" does, and what it means to get boot loops again, right? But that kinda answers my question, in a bad way, it CAN fail completely, and it just did on you, in 6 more month. Damn.

:(

Just in case someone doesn't realize what it is it all about, i'll try to explain using simple terms (although, you'll have to bear with lacking English)...

The intact G4 got 6 CPU cores, 2 "big", fast cores and 4 "normal", slower ones. An affected G4 got a hardware failure that prevents the 2 "big" cores from operating, an attempt to operate those cores causes a reboot. The phone kernel activates the "big" cores pretty much at the very beginning of the boot, and each and every one of us seen what happens next. What the "fix" does is flashing an alternative kernel, packaged by LG, that disables all but one "normal" core, intended for data recovery only, so the affected device could boot. That's what in the .tot files we've all flashed. Its not a real fix, its a workaround, to boot a FUBARed device. What the OP's app does isn't a fix either, it simply edits the startup scripts, commanding this modified kernel to enable the rest of the "normal" cores at the end of the boot, making the device more usable, but again, this doesn't fix a thing. You are running at 1/3 of the "CPU power" or so, but still running, at quite usable speed, which is good.

Now, if the ILAPO happens again, after "fixing", this pretty much means you got no usable CPU cores anymore. Period. That's why your download mode fails to work, too (hey, it needs something to run on. too!).
[G4 Android Development] jafferkhan:
So what I'm getting from this is, it's either the lawsuit against LG to get a newer phone or throw this one away...

Buying a new motherboard isn't worth it, because while ordering one, I saw I could get a working galaxy S 5 for that price, which is more reliable and runs on 6.0 without problems. Plus, the development is pretty good on here too... I've had the G4 repaired over and over again till they're tired of it... I bought the phone new for around 650 bucks... And after a few months it went dead on me.

Tried talking to LG to address but they're replying as if a 5 year old is sitting behind the computer.

The only hope is if the lawsuit goes through and makes LG pay for this. I'm joining in for that though... Since they've recognized the issue but not doing anything about it
[G4 Android Development] InfX:
Just vote with your wallet and never buy anything LG again. Lawsuit simply not worth the time and effort wasted.
[G4 Android Development] jafferkhan:
Agreed. It really is so frustrating, I saved for an entire year to get this phone and it lead me nowhere, never buying an LG phone again. From what I've read, the same issue persists with the G5 and the V10 too...
[G4 Android Development] InfX:
You can fix it if you really want to, the same way LG does it, by replacing the main board. It isn't a complex procedure, someone a bit familiar with this stuff can do it without any instructions, someone that doesn't is going to be able to do so after watching some YouTube videos. The boards should cost around $100..$150, but there are 2 issues with this...

1. You buy the main board, from LG, hence, voting with your wallet IN FAVOUR of this kind of issues. The more people do this, the more incentive LG gets to sell faulty devices, so we keep buying replacement components.

2. The new board is likely to have the same manufacturing defect. Only time can tell when it is going to fail again.
[G4 Android Development] z3r0wan:
LG G4 no download mode

-------

Thanks for explaining this InFX. So if I change the main board it will work again? I'm planning to fix it to sell it but I guess I will spend more if I'm going to do that. Plus, I've brought this phone to the technician and all he did was heating up the memory chip then boom, it boots successfully! But it will not last for a day..
[G4 Android Development] InfX:
Yes, if you change the main board it will work again, although, obviously, your data goes to the trash can along with your old main board. I seriously doubt buying a new main board to fix it and sell it worth the deal, though. Trying to reflow it again (a.k.a - baking it, heating it up etc) may work, but you should be really skilled to do this properly and really lucky for it to actually keep working for long. Can be a good enough way to pull your data of the device, though.
[G4 Android Development] pRimo87:
Hi a have tested with 4 core active with AnTuTu Benchmark v6.2.7 and the score is 51451.

I have been using the phone with 4 cores 3 months now without the problem.
[G4 Android Development] TheMadScientist:
out of curiosity what model u got????
[G4 Android Development] InfX:
I find it rather surprising it has only lost 1/5 or so of the score, despite losing a massive amount of CPU power.
[G4 Android Development] pRimo87:
Its H815 model
[G4 Android Development] z3r0wan:
Can that fix be applied to my G4 too? It's H815 model also. I tried ILAPO and it worked for 6 months. Now, it doesn't boot to 'download mode' either. Thanks.
[G4 Android Development] joriq:
anotherone bites the dust!

So, I have a 508 motherboard and the phone just froze and/or bootlooped. Before I start with this fix and enable 4 cores, I'd like to know what happens exactly after I apply it? Does the phone go back to Lollipop? And do I lose all the installed apps and settings, but keep the data? From what I can see, after the update, the phone boots to initial settings screen, as if it is brand new...
[G4 Android Development] blueeyeblue:
[MENTION=1954089]joriq[/MENTION] - No, you will not lose any data by applying the 4CORE FIX (.tot file) unless you perform either a factory reset or bootloader unlock. Please note that you will have to push "Upgrade" instead of "Refurbish" button. If you follow the video tutorial there should not be any harm done to your device. You can find the step-by-step tutorial in the video's description.

Flash ILAPO FIX .tot file (LGUP App):

#1: https://www.youtube.com/watch?v=lbJXwPmbXFc

To enable the remaining 4 working cores (4CORE FIX App):

#2: https://www.youtube.com/watch?v=-NziX5Fyq58
[G4 Android Development] joriq:
TY! I just went ahead and did it yesterday, because I was quite sure I got it all right. At first I got an error, then I read somewhere that I need to flash the tot file from H815P folder and that worked well. Phone works OK, I get 55000 on Antutu, no data is lost.

BTW, I am using SimpleGX kernel. Do I need to re-apply this fix when I flash a different version of kernel? Also, what would happed if I decide to install another rom, like Genisys?
[G4 Android Development] blueeyeblue:
[MENTION=1954089]joriq[/MENTION] - Good job! You can install Genisys ROM, but you will have to reapply the ILAPO FIX. Furthermore, do not forget the get the 4CORE FIX App (using the second link), so that ILAPO shall not happen again.
[G4 Android Development] joriq:
Regarding 4CORE FIX App, I thought it needs to be installed only if I don't have all 4 cores working, but all 4 are ok on my g4, I got 55000+ on Antutu. Does the app do anything else?
[G4 Android Development] Insumisionx:
I have 3 lg G4 bootloop

Do I have to donate for each of them?
[G4 Android Development] InfX:
Whoever wondering if you can use the custom kernel with this "fix", the answer is "no". The fix pretty much IS a custom kernel, flashef using LGs official method instead of our regular ways.
[G4 Android Development] longlife_01:
Hi blueeyeblue,

Thanks for posting this fix. I thought my phone was in THE bootloop but ended being able to get back in with a simple factory reset. Must have been some other bug which also created a bootloop.

Anyway, I saw this and now to be safe I want to do it before I actually get the "real" bootloop but I have a dual sim h818n on marshmallow and I have a few questions.

- I'll probably be stuck with one core since there is no root for the h818n on MM right?

- Is there a way to revert back?

- Is it important that the tot file is exactly the same? (only v20a is there and I'm on v20e)

Thanks

---------- Post added at 11:57 AM ---------- Previous post was at 11:48 AM ----------

@joriq are you on marshmallow?

anyone else on marshmallow had the same effect of already having the 4 cores without the second fix?

That would be perfect for my case.
[G4 Android Development] blueeyeblue:
[MENTION=8169483]Insumisionx[/MENTION] - Please contact me directly via FB: http://fb.martinelias.cz - I can provide you with one license and a bulk discount.

[MENTION=3194468]longlife_01[/MENTION] - I will try to answer all your questions.

It depends what ROM you use. If you have performed a factory reset previously, you might end up with only 1 core.

Yes. Just flash the stock kdz using LGUP App.

It is not. Well, the version shall not be as important as the model. You can for example try H815 and H815P.

Many people have told me that they have had success with these two LG G4 variants.

Good luck! :)
[G4 Android Development] joriq:
well, I use SimpleGX without any problems :)

i am on MM, got the 4 cores immediately, so all is nice and dandy :)
[G4 Android Development] InfX:
Are you sure you are actually using it? Flashing it - sure, but flashing the fix on top of it, IMO, replaces the kernel again.

Note to self - find a way to unpack the tot file and see whats really in there (but it really should be the kernel).
[G4 Android Development] joriq:
I flashed this ilapo tot file and still had simplegx. How do I know? Because 2.0.3 had issues with video on my version of rom :D So I flashed 2.0.1 and audio on video clips works fine now :)
[G4 Android Development] blueeyeblue:
[MENTION=1954089]joriq[/MENTION] - Good job! :)
[G4 Android Development] exscape:
Well, I got hit with the dreaded bootloop a few hours ago.

I have a H815 (not H815P), and can't flash the H815 image. I've uninstalled LGUP + the DLL, rebooted, reinstalled and still get the same 0x2000 error (secure device but unsecure image).

I then tried the H815P file, which successfully flashed, but it's still looping.

Any advice?

I was on Genisys 4.9 (V20p) or something like that. Modded stock LG 6.0 ROM, anyway.
[G4 Android Development] blueeyeblue:
Hi exscape, I have bought a brand new G4 mainboard. It has been working fine for 3 months by now.

If you are willing to get one either for you or your friends, here is the link: http://odkaz.youber.cz/2qv7lx3

Btw to fix your problem, you can try performing a factory reset. It should work fine, since you successfully flashed the H815P (although not the H815 one) kdz file.
[G4 Android Development] exscape:
Thank you! A factory reset (TWRP wipe) worked! I have to admit I didn't expect it to. :)