Develop Bugs

I totally messed everything up (stuck with brick)

I am an idiot..
Long story short my LG-D852 RGS is showing as an LG-D857 in LG FlashTool and I am unable to flash the correct rom as I keep getting an error message:
"Download fail!! Device model is different"
I somehow flashed my D852 to a D857 while messing around, and now I can not find any way to recover to factory.
Anyone have any solutions that can rescue me from this bricked phone?! PLEASE

If you want some good help to recover your phone go to this thread and ask for help or ask even if it is possible since you flashed the wrong ROM.
http://forum.xda-developers.com/showthread.php?t=2785089
The maintainer of this thread is a really nice guy and has helped thousands of people with these sort of problems.
Hope this helps you somehow.

droidbits said:
If you want some good help to recover your phone go to this thread and ask for help or ask even if it is possible since you flashed the wrong ROM.
http://forum.xda-developers.com/showthread.php?t=2785089
The maintainer of this thread is a really nice guy and has helped thousands of people with these sort of problems.
Hope this helps you somehow.
Click to expand...
Click to collapse
Only way you can fix it is probably kick it into Qualcomm USB Loader 9008 mode

itsbighead said:
Only way you can fix it is probably kick it into Qualcomm USB Loader 9008 mode
Click to expand...
Click to collapse
Yes I actually agree with that.
Here is the link to that thread which is actually closed but the OP of this thread here can have a good read and perhaps Google for the software to download.
http://forum.xda-developers.com/showthread.php?t=3072091

I actually fixed it using a modified .DLL file that bypassed the model mismatch so I used it with the stock bell 5.0.1 and LG flash tool and it finally worked

jetpackjeff said:
I actually fixed it using a modified .DLL file that bypassed the model mismatch so I used it with the stock bell 5.0.1 and LG flash tool and it finally worked
Click to expand...
Click to collapse
Very glad you got it sorted. Another success story!

I am confident this phone is basically unbrickable, much like other LG devices I've had in the past

Recover on from bootloop on H815 EU

Hi guys,
Yesterday I got sweaty hand palms.
My EU 815 G4 is unlocked, the official way, and I had rooted it.
Then I tried to install xposed from twrp and I did something wrong, and ended up in bootloop...
I have just updated to v20b before, and forgot to connect the phone to the PC, and allow the PC debug access before installing xposed, so i could see the phone in ADB mode, but couldn't access it.
Of course I hadn't made a backup before this - I like to cry
Just as a desperate try, when everything else had failed, i thought about using the new tool provided by shakeyabooti LG UP to flash the factory KDZ all over
I put the phone in SW. update mode by:
1. Turning off the phone
2. connecting USB cable to the PC
3. Press and hold vol. up while connecting the USB cable to the phone
Then i downloaded the v20b KDZ file, provided by Autoprime (since this was what i where allready running)
Opened LG UP, loaded the H81520B_00.kdz, marked REFURBISH
Lastly i pressed "Start" and waited for about 15-20 minutes and "TADAAAA"
The phone where up and running again... only things lost where root and TWRP
- Sharing since I'm properly not the only one ending up in this kind of mess :laugh:

Just tried it no luck :/
So just to confirm...unlocking bootloader official way does void warranty and we can not send it in for repairs?

rakinisbat said:
Just tried it no luck :/
So just to confirm...unlocking bootloader official way does void warranty and we can not send it in for repairs?
Click to expand...
Click to collapse
Indeed. Maybe you'll find a cool employee at your vendor who will still do it, but your warranty is definately void and they don't need to do anything. Depends on how acommodating the employee is. If you're stuck in a bootloop @rakinisbat just follow the steps in this thread.
And please keep in mind that there's a way to get out of bootloops 99% of the time (in fact 100% if it's a software related problem), you just have to do a good search on xda. Furthermore there's an uninstaller app for xposed in the official rovo89 thread, which you can flash via recovery and it which undos the xposed installation and your phone will boot fine (if you can access TWRP - just flash it). If you have further questions you can PM me, always happy to help

Follow_and_Feel said:
Indeed. Maybe you'll find a cool employee at your vendor who will still do it, but your warranty is definately void and they don't need to do anything. Depends on how acommodating the employee is. If you're stuck in a bootloop @rakinisbat just follow the steps in this thread.
And please keep in mind that there's a way to get out of bootloops 99% of the time (in fact 100% if it's a software related problem), you just have to do a good search on xda. Furthermore there's an uninstaller app for xposed in the official rovo89 thread, which you can flash via recovery and it which undos the xposed installation and your phone will boot fine (if you can access TWRP - just flash it). If you have further questions you can PM me, always happy to help
Click to expand...
Click to collapse
Thanks Mate, I guess ill have to try my luck with LG,
I have that batch of H815 with the faulty motherboard, unfortunately I'm in that 1% *Sigh* :crying:
Tried literally everything i could with the software, pretty much confirmed it is the motherboard.
It looks like the KDZ is flashing properly, as LGUP shows whichever kdz i put on, but the actual hardware is not capable of booting into the OS.

rakinisbat said:
Thanks Mate, I guess ill have to try my luck with LG,
I have that batch of H815 with the faulty motherboard, unfortunately I'm in that 1% *Sigh* :crying:
Tried literally everything i could with the software, pretty much confirmed it is the motherboard.
It looks like the KDZ is flashing properly, as LGUP shows whichever kdz i put on, but the actual hardware is not capable of booting into the OS.
Click to expand...
Click to collapse
Ugh, okay that's bad luck. Sorry to hear. If it's a motherboard problem I can't help you unfortunately Sorry for that. What is exactly happening when you try to flash via LGUP? Just curious

Follow_and_Feel said:
Ugh, okay that's bad luck. Sorry to hear. If it's a motherboard problem I can't help you unfortunately Sorry for that. What is exactly happening when you try to flash via LGUP? Just curious
Click to expand...
Click to collapse
It flashed perfectly fine, once completed it reboots and just literally sits on the LG logo.....FOREVER or till the battery dies.
So much disappointment in LG

rakinisbat said:
It flashed perfectly fine, once completed it reboots and just literally sits on the LG logo.....FOREVER or till the battery dies.
So much disappointment in LG
Click to expand...
Click to collapse
Oh yeah that really sounds like a hardware problem. Damn it LG! But is your bootloader still locked? You might have a chance to get a new one if it is And if it's a hardware prob you still have your warranty, haven't you?

Follow_and_Feel said:
Oh yeah that really sounds like a hardware problem. Damn it LG! But is your bootloader still locked? You might have a chance to get a new one if it is And if it's a hardware prob you still have your warranty, haven't you?
Click to expand...
Click to collapse
Nope, my bootloader is unlocked, im a flash-a-holic, longest i have lasted without rooting or unlocking a bootloader is about 2 weeks. I would have never imagined such a massive hardware issue with a flagship phone. I'll probably get a nexus 6P atleast it has better support than a LG. I'm in Australia, I imported this phone when it was released, so i have to send this phone overseas if i want it repaired, which they will most likely deny.
Sooooo over LG now! There are like hundreds if not thousands that are effected they are not even acknowledging it or providing a viable solution.

rakinisbat said:
Nope, my bootloader is unlocked, im a flash-a-holic, longest i have lasted without rooting or unlocking a bootloader is about 2 weeks. I would have never imagined such a massive hardware issue with a flagship phone. I'll probably get a nexus 6P atleast it has better support than a LG. I'm in Australia, I imported this phone when it was released, so i have to send this phone overseas if i want it repaired, which they will most likely deny.
Sooooo over LG now! There are like hundreds if not thousands that are effected they are not even acknowledging it or providing a viable solution.
Click to expand...
Click to collapse
Haha! I can completely subscribe to the flash-a-holic :laugh: Well ok. So it's even worse than i thought Sorry for ya. At least you live on a continent everyone here desires to go to :laugh: Going to Australia is very popular in germany But sorry that you're experiencing trouble with your LG. Good luck with that nexus - it's an awesome phone, too. Bye bye

I've got the bootloop issue. Phone was turning on or not, just vibrating etc. I've dissassembled it, assembled again and it started working don't know why...Now I've flashed CM I was on Genisis ROM earlier maybe that was the issue

zwodziarz said:
I've got the bootloop issue. Phone was turning on or not, just vibrating etc. I've dissassembled it, assembled again and it started working don't know why...Now I've flashed CM I was on Genisis ROM earlier maybe that was the issue
Click to expand...
Click to collapse
Hi sir
I decide to buy lg g4.
If i flash cm ,bootloop not happend again?
Thank you

It doesn't matter what firmware you have got. Bootloop is happening because of hardware failure.
Odesláno z mého LG-H815 pomocí Tapatalk

HELP needed

I bought a g4 near a week ago and it says on the back sticker that its H811 but when i entered download mode it was korean and i found something mentioning f500 any way i flashed 20r kdz for h811 and phone bricked(9008 mode)then i used ls991 mbn file to use in QFIL and revive my phone now when i flash any kdz for h811 phone bricks and i have to flash mbn files again however the phone boots up but no camera no imei no baseband im very confused can anyone help?
Any chance that flashing f500l tot file revive the phone?
Thanks.

shamescool said:
I bought a g4 near a week ago and it says on the back sticker that its H811 but when i entered download mode it was korean and i found something mentioning f500 any way i flashed 20r kdz for h811 and phone bricked(9008 mode)then i used ls991 mbn file to use in QFIL and revive my phone now when i flash any kdz for h811 phone bricks and i have to flash mbn files again however the phone boots up but no camera no imei no baseband im very confused can anyone help?
Any chance that flashing f500l tot file revive the phone?
Thanks.
Click to expand...
Click to collapse
may have to dissassmble the device and find out what motherboards on it weve seen cases like this before and its not easy i would return it and say wtf

TheMadScientist420 said:
may have to dissassmble the device and find out what motherboards on it weve seen cases like this before and its not easy i would return it and say wtf
Click to expand...
Click to collapse
you would say there is a chance to recover it or not?does it worth it?
Thanks for reply

shamescool said:
you would say there is a chance to recover it or not?does it worth it?
Thanks for reply
Click to expand...
Click to collapse
In my opinion no its not worth the hassle but ot only takes 5 mine to check ot 2. Unless its got the bootloop issue or hard bricked its fixable. But how determined are you.

TheMadScientist420 said:
In my opinion no its not worth the hassle but ot only takes 5 mine to check ot 2. Unless its got the bootloop issue or hard bricked its fixable. But how determined are you.
Click to expand...
Click to collapse
my phone boots up completely but no baseband no imei or anything and that infamous 9008 brick is fixable with ls991 laf.img and 8992.mbn and etc... files and here is my next approaches please if you have enough aknowledge guide me with these options i have or add any if something came on your mind:
1.Flashing a ls991 model kdz and see what comes out(probably not doable,lgup may not let me flash it)
2.while surfing through the forums and threads i found the exact H811 10N Laf.img and i will replace it with ls991's and will use QFIL to correct the partitions and then my phone would be fixed(im too scared for this one...maybe my phone is a refurbished F500...who knows? :fingers-crossed: )
3.Maybe finding and flashing F500 laf.img fix the phone but a HUGE problem i am facing:where to find that file?
Note:All i am trying to do is to fix this phone by software approaches and disassembling the phone is out of my options for now(only will do if none of above fix it properly)
So with all of that what would you do if you be in my shoes?:cyclops:
Always hated LG and admired Sony but i started to hate xperia x series because of weak development so i bought this one for around 100$ in your currency.:laugh:

Id send it back.

TheMadScientist420 said:
Id send it back.
Click to expand...
Click to collapse
My curiousity will kill me someday
I believe i can fix it and beside that learning new things about lg devices is interesting since i bought it for only 100 bucks from an old pal who does nt know what actually smart phone is:laugh:
Anyway i learnt how to extract laf from kdz files and im going to test both f500l and h811 and pray:cyclops:
if i fix it properly i would make a thread to share my experience with this refurbished(dont know actually if it is)
phone and help people who brick their refurbished phone and dont know how to fix it

shamescool said:
My curiousity will kill me someday
I believe i can fix it and beside that learning new things about lg devices is interesting since i bought it for only 100 bucks from an old pal who does nt know what actually smart phone is:laugh:
Anyway i learnt how to extract laf from kdz files and im going to test both f500l and h811 and pray:cyclops:
if i fix it properly i would make a thread to share my experience with this refurbished(dont know actually if it is)
phone and help people who brick their refurbished phone and dont know how to fix it
Click to expand...
Click to collapse
i use the old wilcracks diag toot and lg firware extractor to extract any bins u need

TheMadScientist420 said:
i use the old wilcracks diag toot and lg firware extractor to extract any bins u need
Click to expand...
Click to collapse
then i will use them to crack open kdz from both H811 and F500L firmwares to flash laf and other messed up files with fastboot
but im wondering which one should i try first because im concerned if i flash wrong files then there will be even no 9008 mode to use QFIL and get back to very first step...
What is going to happen exactly when i flash another varient's laf? will it kill the phone completely or will there be any 9008?
Thanks for those apps you mentioned btw:good:

shamescool said:
then i will use them to crack open kdz from both H811 and F500L firmwares to flash laf and other messed up files with fastboot
but im wondering which one should i try first because im concerned if i flash wrong files then there will be even no 9008 mode to use QFIL and get back to very first step...
What is going to happen exactly when i flash another varient's laf? will it kill the phone completely or will there be any 9008?
Thanks for those apps you mentioned btw:good:
Click to expand...
Click to collapse
yea ive been using em since g2.and i use em on all lgs . diag tool is for flashing but at the bottom u can extract
i get my own .dlls for lgg2 flash tool and i flash orig g4 firmware with it still.
if i could find the tot would for g5.
now if u break 9008 jtag i think is the only fix i dont know the pin outs or if the g4 even supports that like the g3 and 2. thats why i say take device apart its fricken easy there should be a sticker on the mother board or stamps that say the mbs model and go from there

TheMadScientist420 said:
yea ive been using em since g2.and i use em on all lgs . diag tool is for flashing but at the bottom u can extract
i get my own .dlls for lgg2 flash tool and i flash orig g4 firmware with it still.
if i could find the tot would for g5.
now if u break 9008 jtag i think is the only fix i dont know the pin outs or if the g4 even supports that like the g3 and 2. thats why i say take device apart its fricken easy there should be a sticker on the mother board or stamps that say the mbs model and go from there
Click to expand...
Click to collapse
dissembled the phone and it was f500l as expected so i decided to go with f500 laf.img and then my phone got fixed up completely ive even replaced modem and other h811 things except for system now my phone is working perfect again and im going to flash a stock based rom's system.img (10N) with fastboot
Thanks for your precious info once again:cyclops:

shamescool said:
dissembled the phone and it was f500l as expected so i decided to go with f500 laf.img and then my phone got fixed up completely ive even replaced modem and other h811 things except for system now my phone is working perfect again and im going to flash a stock based rom's system.img (10N) with fastboot
Thanks for your precious info once again:cyclops:
Click to expand...
Click to collapse
These guys will piece these things together and mislabel crap. Just to make a dollar. Im glad to see ure good to go.

TheMadScientist420 said:
These guys will piece these things together and mislabel crap. Just to make a dollar. Im glad to see ure good to go.
Click to expand...
Click to collapse
Actually LG devices are very easy to disassemble so people like them wont put so much effort to refurbish LG phones and earn themselves some easy money.
And believe me Iran is the heaven of refurbished and chinese phones
Mostly because many cant afford to buy their phones and other stuff from trusted sellers and they buy them with no warranty(or guarranty)from third party sellers.
Actually they have a place for themselves in downtown(Aladdin building).
But i wanted a flagship LG device to learn more about it and i got it for a couple of bucks so it really didnt matter if my G4 didnt work as expected.
But its always a pleasure to make some mystery and try to crack the case by yourself :laugh:

shamescool said:
Actually LG devices are very easy to disassemble so people like them wont put so much effort to refurbish LG phones and earn themselves some easy money.
And believe me Iran is the heaven of refurbished and chinese phones
Mostly because many cant afford to buy their phones and other stuff from trusted sellers and they buy them with no warranty(or guarranty)from third party sellers.
Actually they have a place for themselves in downtown(Aladdin building).
But i wanted a flagship LG device to learn more about it and i got it for a couple of bucks so it really didnt matter if my G4 didnt work as expected.
But its always a pleasure to make some mystery and try to crack the case by yourself :laugh:
Click to expand...
Click to collapse
the whole lg g series is a wonderful device for do it your self i have owned a g2 g3 g4 and now g5 even thought i said i would never by lg again after g4 i got a stylo3 and my wife sports a stylo 2
im working on a us cellular s5 now as we speak and i sometimes run my gs6 edge nut not much since i got g5.

TheMadScientist420 said:
the whole lg g series is a wonderful device for do it your self i have owned a g2 g3 g4 and now g5 even thought i said i would never by lg again after g4 i got a stylo3 and my wife sports a stylo 2
im working on a us cellular s5 now as we speak and i sometimes run my gs6 edge nut not much since i got g5.
Click to expand...
Click to collapse
of course they are great but hardware faults are pretty big deal but for me sony z series were better right until z3+ .for now im happy with my htc u11 and im not going to unlock it or anything.
maybe i use g4 as my secondary device instead of xperia z2.
its a shame that sony is not in its golden age (2011-2013) anymore...
will make a thread to help people like me to unbrick their refurbished device
Thanks for everything

[CLOSED][ANY BL locked G4]need testers [follow the new thread!]

First of all: Do not continue if you don't know what a hard brick is!!!
so well its that simple: Either my method will work or fail.
Please follow the story here now:
https://forum.xda-developers.com/g4/general/bl-unlock-unlock-bootloader-proof-t3648288
Previously this was the OP:
if not: this could result in a completely unusable device (soft or even hard bricks are possible)
If it works: you could unlock your phone in fastboot with a simple command - no unlock key is required (but even when the method WORKS its possible that this produces other issues. we can not know all impacts yet)
So AGAIN
The whole process is dangerous but the chance to get an unlocked phone would be worth it - maybe. It depends on you.
I can't test it atm by myself because my device is on its way to LG (due to another issue)..
My method does not modify something within the bootloader like others tried already - because this would definitively break the boot chain.
I will not release any details to the public until there is anything proofed or verified. The whole process is very risky and as said: I have currently no device to test it.
The only thing which is proofed is the theory. It should work as long as nothing unpredictable happens: As long as we do not own the complete sources of all parts of the boot chain there is still a risk.
Keeping the details under the hood is not to make things mysterious. It's just for safety reasons until I can proof anything.
If you still ask for details here or by PM they will not be answered.
If you not able to join an IRC channel you better leave it directly.
I'm not 24/7 online but usually from Mo-Fr for sure so it is important to wait for answers while in the IRC because depending on your timezone this can take some hours (hey I have to sleep somewhen!)
Once I have my device back from LG I can test the method by myself on a H815 EUR version. It doesn't matters that this can be officially unlocked though. The risks are the same.
So if you're too scared for the moment just wait about 2 weeks or so and then I can tell if it worked on my device at least.
.... and if you do not want to wait: Follow me into the IRC for instructions
If you never were in touch with IRC before here are some client examples for you:
PC (HexChat and Pidgin are only 2 of them! This list is not complete!)
Android (Yaaic, AndChat, HoloIRC, AndroIRC are only a few of them! This list is not complete!)
The IRC channel is: #Carbon-user
The IRC server network is: freenode
Once you're connected with the IRC network I need this from you:
your phone model
the currently installed EXACT firmware (link to the used KDZ would be most helpful. If you have none check the phone details and e.g. make screenshots)
.

reserved

Super excited about the possible G4 unlock! Wish I could test it but my phone is my daily driver and my source of internet at home so if it breaks, I'm screwed for my online classes. Thanks for your hard work as always!

steadfasterX said:
reserved
Click to expand...
Click to collapse
ima see if i can get her to boot up since mines about trashed anyways lol
ls991
zv6 firmware
lol i got the perfect test subject if she will boot
cant try it on a g5 can you

Good luck to the testers, we're all rooting for an unlocked H818p Brazil.

TheMadScientist420 said:
ima see if i can get her to boot up since mines about trashed anyways lol
ls991
zv6 firmware
lol i got the perfect test subject if she will boot
cant try it on a g5 can you
Click to expand...
Click to collapse
is download mode working?
zv6 is LL or MM?
Go familiar with IRC asap then.. see u there
.

steadfasterX said:
is download mode working?
zv6 is LL or MM?
Go familiar with IRC asap then.. see u there
.
Click to expand...
Click to collapse
no she wont boot anything dead as can be like no power no nothing pc dont even been when plugged in
---------- Post added at 06:59 AM ---------- Previous post was at 06:48 AM ----------
ive took her apart like 5 times hoping something stupid shes got a hairline crack in the motherboard rite by the main camera rite on the top

Unbrick
TheMadScientist420 said:
no she wont boot anything dead as can be like no power no nothing pc dont even been when plugged in
---------- Post added at 06:59 AM ---------- Previous post was at 06:48 AM ----------
ive took her apart like 5 times hoping something stupid shes got a hairline crack in the motherboard rite by the main camera rite on the top
Click to expand...
Click to collapse
It happened to mine 818p too, you need to disasseble it and short two pins on the motherboard while starting it. (They are in the upper left corner on the MB.) This page (forum.gsmhosting.com/vbb/f779/unbrick-lg-g4-brick-hs-usb-qdloader-9008-without-box-2211744/) has the entire process explained but I was unable to sucessfully use the QFIL app, it didnt recover anything, at least the phone was seen on PC as the 9008 serial port. I hope it helps
P.S: Sorry for my bad english.

i hope you get it going man. so lots of users can enjoy this device like it should be.. youll be saving LG G4.. am glad that what i mentioned you got your brain thinking and finding ways i beleive this all was what i mention on fish. good luck to all of you.:fingers-crossed:

Tomonok said:
It happened to mine 818p too, you need to disasseble it and short two pins on the motherboard while starting it. (They are in the upper left corner on the MB.) This page (forum.gsmhosting.com/vbb/f779/unbrick-lg-g4-brick-hs-usb-qdloader-9008-without-box-2211744/) has the entire process explained but I was unable to sucessfully use the QFIL app, it didnt recover anything, at least the phone was seen on PC as the 9008 serial port. I hope it helps
P.S: Sorry for my bad english.
Click to expand...
Click to collapse
Its not bricked. I thre it about 6 months ago. Destroyed her. It cracked the mb ruined the rear camera. The earpice speaker. Ir port. And wifi antenna.
I put a old cracked screen on her and been using it since til about 2 or weeks ago it just shut off. Dead. It has heavy damage interiorly. I got the multimeter out and not getting any voltage any where on the board. Thats why i say if itll boot i got a perfect canidate
---------- Post added at 01:45 PM ---------- Previous post was at 01:43 PM ----------
raptorddd said:
i hope you get it going man. so lots of users can enjoy this device like it should be.. youll be saving LG G4.. am glad that what i mentioned you got your brain thinking and finding ways i beleive this all was what i mention on fish. good luck to all of you.:fingers-crossed:
Click to expand...
Click to collapse
Im trying to solder a coulple point together on mb to see if shell boot. But im jot even gettin charging lights.
---------- Post added at 01:45 PM ---------- Previous post was at 01:45 PM ----------
Like i said ill throw down my g5 on nougat lol. If it work for her should for g4

TheMadScientist420 said:
Its not bricked. I thre it about 6 months ago. Destroyed her. It cracked the mb ruined the rear camera. The earpice speaker. Ir port. And wifi antenna.
I put a old cracked screen on her and been using it since til about 2 or weeks ago it just shut off. Dead. It has heavy damage interiorly. I got the multimeter out and not getting any voltage any where on the board. Thats why i say if itll boot i got a perfect canidate
Click to expand...
Click to collapse
Oh, sorry, I thought it was bricked, not physically broken.

Tomonok said:
Oh, sorry, I thought it was bricked, not physically broken.
Click to expand...
Click to collapse
Yea i still used it for about 6 months. Put the fish to her. Even still vred with thr cracked screen. Like i said. Went to check the time and nothin. So im assuming shes dead. Ive done got a g5.no root and no twrp. Yea. Just the way i like it. I know i know. If i wanted root i shoulda bought an unlockable model. But i take what i can get cheap. Bought my sprint g5 for 25 bucks at a police auction

steadfasterX said:
is download mode working?
zv6 is LL or MM?
Go familiar with IRC asap then.. see u there
.
Click to expand...
Click to collapse
Hi, I have the model H815T but... now it Hard Bricked haha. Anyway, I can boot it like LS991 model (with QFIL), and Download Mode it's working too. So... is useful for your method?

steadfasterX said:
First of all: Do not continue if you don't know what a hard brick is!!!
so well its that simple: Either my method will work or fail.
if not: this could result in a completely unusable device (soft or even hard bricks are possible)
If it works: you could unlock your phone in fastboot with a simple command - no unlock key is required (but even when the method WORKS its possible that this produces other issues. we can not know all impacts yet)
So AGAIN
The whole process is dangerous but the chance to get an unlocked phone would be worth it - maybe. It depends on you.
I can't test it atm by myself because my device is on its way to LG (due to another issue)..
My method does not modify something within the bootloader like others tried already - because this would definitively break the boot chain.
I will not release any details to the public until there is anything proofed or verified. The whole process is very risky and as said: I have currently no device to test it.
The only thing which is proofed is the theory. It should work as long as nothing unpredictable happens: As long as we do not own the complete sources of all parts of the boot chain there is still a risk.
Keeping the details under the hood is not to make things mysterious. It's just for safety reasons until I can proof anything.
If you still ask for details here or by PM they will not be answered.
If you not able to join an IRC channel you better leave it directly.
I'm not 24/7 online but usually from Mo-Fr for sure so it is important to wait for answers while in the IRC because depending on your timezone this can take some hours (hey I have to sleep somewhen!)
Once I have my device back from LG I can test the method by myself on a H815 EUR version. It doesn't matters that this can be officially unlocked though. The risks are the same.
So if you're too scared for the moment just wait about 2 weeks or so and then I can tell if it worked on my device at least.
.... and if you do not want to wait: Follow me into the IRC for instructions
If you never were in touch with IRC before here are some client examples for you:
PC (HexChat and Pidgin are only 2 of them! This list is not complete!)
Android (Yaaic, AndChat, HoloIRC, AndroIRC are only a few of them! This list is not complete!)
The IRC channel is: #Carbon-user
The IRC server network is: freenode
Once you're connected with the IRC network I need this from you:
your phone model
the currently installed EXACT firmware (link to the used KDZ would be most helpful. If you have none check the phone details and e.g. make screenshots)
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Click to expand...
Click to collapse
Now out of curiosity would a bootlooped g4 work. Most of em boot into dl mode and if it bricks dl modde youd know rite away anyways right?

the_naxhoo said:
Hi, I have the model H815T but... now it Hard Bricked haha. Anyway, I can boot it like LS991 model (with QFIL), and Download Mode it's working too. So... is useful for your method?
Click to expand...
Click to collapse
Qcom 9008 mode? It could be fixed afaik.. You can also try the sdcard boot method for this kind of brick. you should try that first in any case..
I'm not sure if my method will work in that kind of brick mode you are in but if you nevertheless want to test you need Linux / best is using FWUL because it has everything needed inside.
Once ready went to IRC on Mo-Fr and stay until Im there.
TheMadScientist420 said:
Now out of curiosity would a bootlooped g4 work. Most of em boot into dl mode and if it bricks dl modde youd know rite away anyways right?
Click to expand...
Click to collapse
it depends. When it stays in download mode without looping.. yes - maybe!
I need access to to the partitions which may work even in download mode via a special shell but it may requires MM and will not work for LL firmware (strange right? normally one would expect the other way around..).
That has to be tested though. On my device (locked H815) I had access but that may differ from other models.
Having root access makes things so much more easier
Testing if it would be possible on a bootlooping device would be simple:
You best use FWUL (recommended because here is all installed and working) or any other Linux with the LGLaf shell.
You would then connect while in download mode and you will have a shell like in adb.
I can guide you but again IRC is the best way to go here..
I'm searching since several days for such looping and even otherwise broken/defect devices but they all want to have a plenty of money for it (80-150 €!!)
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steadfasterX said:
Qcom 9008 mode? It could be fixed afaik.. You can also try the sdcard boot method for this kind of brick. you should try that first in any case..
I'm not sure if my method will work in that kind of brick mode you are in but if you nevertheless want to test you need Linux / best is using FWUL because it has everything needed inside.
Once ready went to IRC on Mo-Fr and stay until Im there.
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Click to expand...
Click to collapse
Yes, QCOM 9008 mode. I can't flash the H815 image and make my G4 H815 again so, the only way to booting, it's flashing the LS991 image (and with Fastboot; I flashing every partition one by one).
I have Linux Mint whit adb/fastboot drivers, It's enough?

the_naxhoo said:
Yes, QCOM 9008 mode. I can't flash the H815 image and make my G4 H815 again so, the only way to booting, it's flashing the LS991 image (and with Fastboot; I flashing every partition one by one).
I have Linux Mint whit adb/fastboot drivers, It's enough?
Click to expand...
Click to collapse
Hmm I can't help you unbricking. I just know that there are ways to do so. You need the correct drivers etc.. But well if you tried all this already we can try
Any Linux is ok as long as you can handle it
Havin TeamViewer installed may help too...
Well so if you like go to IRC Monday to Friday and we will see
Edit:
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Do you have seen this? https://forum.xda-developers.com/g4/help/lg-g4-force-to-enter-qhsusbbulk-t3633583
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Sent from my LG-H815 using XDA Labs

So... This has been quite quiet... Has anyone tried this method yet??
Sent from my LG-H870 using Tapatalk

U
lmiked said:
So... This has been quite quiet... Has anyone tried this method yet??
Click to expand...
Click to collapse
Yes. today I have bad and good news.
First of all I had 1 single tester who was brave enough going the first approach I had. Unfortunately my first idea failed.
JL if you see this come back I said I can unbrick your device!!!
Ok so the good news are: I'm able to give you a near unlocked experience with all the things you love like installing custom kernel, recovery and ROM. Without actually unlocking!!! It's all tested on a h815 device which was never unlocked !
Near unlocked means it will behave like an unlocked device without actually unlocking the bootloader. Or to say it in other words: The boot chain verification is ignored.
The bad news: the process is not cleaned out yet but it requires one thing for sure: it will convert your whole device bootloader stack. The basic idea is to replace the whole bootloader stack with a modified one which allows all the mentioned things.
That way is very risky and I HARD bricked my device over 30 times until getting to the finally working result.
It also means that once your device is converted there is no way back atm. Flashing an original kdz will BRICK your device in 9008 mode! Not that bad because you can recover at any time but that's one thing you have to have in mind. It may never be a h811, h812..... whatever again. Until we find a corresponding and working bootloader replacement which may never happen. So no LG up or LG flash tools anymore! Instead you will have the qfil tool.
Again I know no way back to original state so warranty will be very very likely refused once you do this. Ok there is a way to blank out all partitions just for the case you need to send it really back. This should delete then most traces of this hack but no guarantees.
Besides this I don't know if there are any issues in functionality after doing all this. I havent made any tests for this yet. That includes phone calls, WiFi etc. I just checked booting ROM, booting TWRP, flashing supersu, getting root.
I will upload a video asap to show you the current result.
I need to test things further and of course I need testers with other devices. Again that process is risky and even if it worked for me it may not work for you (very unlikely but who knows). Manually forcing the 9008 is very easy and it may be required to do so. This may requires opening the device (I think it will work even without but I need testers.. ) so if you want to test... See you in the IRC.
If all this is working and verified by others I will provide the whole story ofc!
....can't believe that all these above took me 5 days in full time of work. And for what? I mean I do not need it because I can unlock my device OFFICIALLY..
BUT it was all for educational learning. I learned really a LOT of android and qcom during all these hours ...
Ok but Now I need some couple of hours of sleep
See u on the other site..
sfX
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Sent from my LG-H815 using XDA Labs

so........what now ? i have a F500k device . and i'm willing to test your method . but i'm not sure what you are saying here. ( i didn't understand a single word) . but if it means that i can't flash official KDZ or can't use LGUP....no problem to me.
just share to me how i'll do it and if i hardbrick how i'll restore it. thats all.

i bought an LG G4 with a model number of h811 but with sprint serial number

Dear fellow XDA members i bought an LG G4 H811 and when tried rooting it with no luck by pure luck i noticed that the serial number starts with ls991... Now the rom is 20R as a normal T-Mobile phone ... Anyone faced this issue before ? If so how do i root this phone ?
Thank you

empreror said:
Dear fellow XDA members i bought an LG G4 H811 and when tried rooting it with no luck by pure luck i noticed that the serial number starts with ls991... Now the rom is 20R as a normal T-Mobile phone ... Anyone faced this issue before ? If so how do i root this phone ?
Thank you
Click to expand...
Click to collapse
first you dont know what you have.. i suggest to open the phone and take out motherboard. see plaque model if it says h811 then you have h811 if its says ls9 then you have sprint.. thats the only way. they maybe edited software easy to do.. but you can not change model in plaque ..

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raptorddd said:
first you dont know what you have.. i suggest to open the phone and take out motherboard. see plaque model if it says h811 then you have h811 if its says ls9 then you have sprint.. thats the only way. they maybe edited software easy to do.. but you can not change model in plaque ..
Click to expand...
Click to collapse
Thank you for the reply ... Now which one of them can i rely on to determine what to flash on it ... I wanna root the phone and get a custom rom on ... Ive tried to get it to go to the bootloader but it simply restarts without going for the bootloader and im not quite sure what i can do next.. Any tips ?

Sounds like a two part phone.
Has been refurbished..... Most likely sprint motherboard.....bad news

empreror said:
​
Thank you for the reply ... Now which one of them can i rely on to determine what to flash on it ... I wanna root the phone and get a custom rom on ... Ive tried to get it to go to the bootloader but it simply restarts without going for the bootloader and im not quite sure what i can do next.. Any tips ?
Click to expand...
Click to collapse
motherboard thats your variant

empreror said:
Dear fellow XDA members i bought an LG G4 H811 and when tried rooting it with no luck by pure luck i noticed that the serial number starts with ls991... Now the rom is 20R as a normal T-Mobile phone ... Anyone faced this issue before ? If so how do i root this phone ?
Thank you
Click to expand...
Click to collapse
Same issue here but my phone is a refurbished f500l
I suggest you to not customize anything because there is nothing good when it comes to customizing a refurbished phone even flashing official kdz just let it go or you would be in your worst case of customizing
But if you insist you may want to search about qualcomm 9008 mode a little
Best wishes.

shamescool said:
Same issue here but my phone is a refurbished f500l
I suggest you to not customize anything because there is nothing good when it comes to customizing a refurbished phone even flashing official kdz just let it go or you would be in your worst case of customizing
But if you insist you may want to search about qualcomm 9008 mode a little
Best wishes.
Click to expand...
Click to collapse
Thank you brother .. Im having a huge battery drain and im suspecting that its a bloatware issue .. How do i overcome this ?

empreror said:
Thank you brother .. Im having a huge battery drain and im suspecting that its a bloatware issue .. How do i overcome this ?
Click to expand...
Click to collapse
I have battery issues too its lg bloatwares but you should have root to modify system and remove crapware(some of them can be disabled through apps menu)
First,try some apps like kingo .etc and see if those apps work because king root worked for me when i had h811 10n rom however its super user app is nothing but bull****...it will do the trick on the other hand.
Second(which i really dont recommend),try low effort root and injecting rooted system with send command and adb search for it in this forum and you will find it.
What i strongly recommend is getting along with it
Because this phone does nt worth the hassle to modify any thing on it if you have a refurbished device
Peace✌