Develop Bugs

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

LG G4 H815 Reboot Problem !?

Hello All,
I have LG G4 H815, after 6 month of use, the mobile reboot without reason (First freeze then reboot) ... "sometimes within two minutes, rebooted 10 times"
I try to change the battery from another device, The problem still exists
trying to install KDZ rom 6.0 V20C, same ...
What is the problem, and What are the proposed solutions

maen.safadi said:
Hello All,
I have LG G4 H815, after 6 month of use, the mobile reboot without reason (First freeze then reboot) ... "sometimes within two minutes, rebooted 10 times"
I try to change the battery from another device, The problem still exists
trying to install KDZ rom 6.0 V20C, same ...
What is the problem, and What are the proposed solutions
Click to expand...
Click to collapse
does it boot into android? thers the bootloop issue that only LG logo and reboots...you need to send to Lg for bootloop issue.. or maybe yours is about to get ILAPO bootloop problem

raptorddd said:
does it boot into android? thers the bootloop issue that only LG logo and reboots...you need to send to Lg for bootloop issue.. or maybe yours is about to get ILAPO bootloop problem
Click to expand...
Click to collapse
No bootloop, it pass android logo

maen.safadi said:
No bootloop, it pass android logo
Click to expand...
Click to collapse
flash stock KDZ and see if it still happens.

raptorddd said:
flash stock KDZ and see if it still happens.
Click to expand...
Click to collapse
flashed MM v20c, but still happens

maen.safadi said:
Hello All,
I have LG G4 H815, after 6 month of use, the mobile reboot without reason (First freeze then reboot) ... "sometimes within two minutes, rebooted 10 times"
I try to change the battery from another device, The problem still exists
trying to install KDZ rom 6.0 V20C, same ...
What is the problem, and What are the proposed solutions
Click to expand...
Click to collapse
You may have gotten yourself into the famous bootloop issue on ur device which is G4 famous for.. Its a hardware issue caused by seperation between the joints in the motherboard..if ur in warranty take it to LG if not prepared to spend atleast 200$ to fix it...there is a method also by disabling cores in which u have to be already in lollipop n flash certain firmware...so check these forums on how to disable the cores..also have u tried the cse flash in lg flashtool meaning complete stock try doing that too

jinderation said:
You may have gotten yourself into the famous bootloop issue on ur device which is G4 famous for.. Its a hardware issue caused by seperation between the joints in the motherboard..if ur in warranty take it to LG if not prepared to spend atleast 200$ to fix it...there is a method also by disabling cores in which u have to be already in lollipop n flash certain firmware...so check these forums on how to disable the cores..also have u tried the cse flash in lg flashtool meaning complete stock try doing that too
Click to expand...
Click to collapse
I sent it today to the LG, after checking it, They found that the problem from board
the problem with me that the device is not on warranty in my country , i bought it from shop (International)
LG Company is a big S**T (Conclusion)

maen.safadi said:
I sent it today to the LG, after checking it, They found that the problem from board
the problem with me that the device is not on warranty in my country , i bought it from shop (International)
LG Company is a big S**T (Conclusion)
Click to expand...
Click to collapse
Thats the problem with LG ... This is a factory issue thats why i mention on my thread why somebody has to take LG to court for making faulty phones in the first place

My G4 H815 belivies it is a h818

Hi,
After upgrading from 5.1 to 6.0 my G4 got some issues.
First of all when i turn it one never turns the creen on. I had to do a work around using the USB cable to get the screen on and that doesn't wark very often eatheir so its preatty annoing.
Second the sim is not working.
I tryed many time to roll back or flash a new firmware but it didnt work.
I also find out when the phone is in download mode that is says LG-H818 but mine is fore sure a H815.
Is it some way to fix it?
Thanks

What rom did u flash mind sharing here ? Or was it OTA?

jinderation said:
What rom did u flash mind sharing here ? Or was it OTA?
Click to expand...
Click to collapse
I just connected the phone to LGBridge and it notified the marshmallow update. I dont' know why it flashed a h818 rom

Does anyone know if there is a way to put the H815 firmware back? right know it believes to be a h818 so it doesnt allow me to flash it. WIth the h818 doesnt even turn on right now

Is ur phone recently repaired by lg or did u bought it used ? Cuz there is no way lg bridge can make mistake on ur g4s varaint...either someone u bought off tried to change the buid prop file to make u believe its h815 or ur phone is refurbished/repaired using components n sensors of other model

I bought it from a guy and the phone was totally new ( it had all the protection film on it and even the box was sealed).
I'm starting to think it was regenerated but i dont understand how could it be the dual sim one.
Do you have any suggestion how to fix it? right now i can just uplad h818 firmware from lgup but of course they are not working

Scaf13 said:
I bought it from a guy and the phone was totally new ( it had all the protection film on it and even the box was sealed).
I'm starting to think it was regenerated but i dont understand how could it be the dual sim one.
Do you have any suggestion how to fix it? right now i can just uplad h818 firmware from lgup but of course they are not working
Click to expand...
Click to collapse
Its probably refurbished ...if i were u i wont try to tinker any software things u might probably brick it so most probably leave it as it is good thing to know that atleast ur phone wont bootlooop like the rest...try contacting the person u bought it from or check it if its under warranty by lg from him

Right now its already rebooting aftern turning on, so i can not se how could damage it more. Any suggestion for possible solution?

Scaf13 said:
Right now its already rebooting aftern turning on, so i can not se how could damage it more. Any suggestion for possible solution?
Click to expand...
Click to collapse
If u have warranty send it to lg u dont have any other options left...next time dont buy cheap refurbished phones n also dont buy lg

Scaf13 said:
Hi,
After upgrading from 5.1 to 6.0 my G4 got some issues.
First of all when i turn it one never turns the creen on. I had to do a work around using the USB cable to get the screen on and that doesn't wark very often eatheir so its preatty annoing.
Second the sim is not working.
I tryed many time to roll back or flash a new firmware but it didnt work.
I also find out when the phone is in download mode that is says LG-H818 but mine is fore sure a H815.
Is it some way to fix it?
Thanks
Click to expand...
Click to collapse
Is it a refurbished phone ?

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

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 ..

​
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✌