Develop Bugs

Help - Stuck on Download Mode

I rooted and flashed Sphinx. The ROM somehow kept me from hearing the other person on the other line when making calls and they couldn't hear me. So I was trying to unroot by using the Flashroot tool method. And now I'm stuck on download mode.
I have a d855. How do I unroot properly and how do I get out of the download mode.
This is my first time rooting an LG phone :/

Duhhrenn said:
I rooted and flashed Sphinx. The ROM somehow kept me from hearing the other person on the other line when making calls and they couldn't hear me. So I was trying to unroot by using the Flashroot tool method. And now I'm stuck on download mode.
I have a d855. How do I unroot properly and how do I get out of the download mode.
This is my first time rooting an LG phone :/
Click to expand...
Click to collapse
Hold the power button for 10 secs to reboot to normal. <<<<<<<< Depending on what you have done >>>>>>>>>>
ENSURE that no transfers or other process are in progress or you will have a bad day. I don't know what you have done on your phone but ensure you read the thread you are following completely.
Are you trying to restore to stock? There are a few threads that you need to follow exactly or you will brick your device.

Tweakecho said:
Hold the power button for 10 secs to reboot to normal. <<<<<<<< Depending on what you have done >>>>>>>>>>
ENSURE that no transfers or other process are in progress or you will have a bad day. I don't know what you have done on your phone but ensure you read the thread you are following completely.
Are you trying to restore to stock? There are a few threads that you need to follow exactly or you will brick your device.
Click to expand...
Click to collapse
The method failed, so I gave up and wanted to just reboot. Did a batter pull and was able to get to the factory reset screen, but it just loops back to download mode.

Duhhrenn said:
The method failed, so I gave up and wanted to just reboot. Did a batter pull and was able to get to the factory reset screen, but it just loops back to download mode.
Click to expand...
Click to collapse
follow this, for your variant, it should get you back on track don't forget to check the hashes as a bad download would cause it to fail.
http://forum.xda-developers.com/showthread.php?t=2785089

Duhhrenn said:
I rooted and flashed Sphinx. The ROM somehow kept me from hearing the other person on the other line when making calls and they couldn't hear me. So I was trying to unroot by using the Flashroot tool method. And now I'm stuck on download mode.
I have a d855. How do I unroot properly and how do I get out of the download mode.
This is my first time rooting an LG phone :/
Click to expand...
Click to collapse
I don't have the links to the tread where I got these from but lets just hope I don't get banned.
1) go to download mode
2) install this and download the correct .kdz file for your phone
-Modelnumber is ...
-serial number is your imei number
- wait until the download is done
3) run the lgflashtool2014.exe from this zip
-Select type= cdma
-phone mode= Diag
-reset time=33000
-Should be like this when You run it
-select kdz file= is where you need to find the kdz file you just downloaded(step 1)
-then press cse flash
-in the now pop-up window select start
-select your language
-ignore error (cannot connect to lg server)
-check progress on phone up to 100% then boots in recovery installs and restarts
-wait untill it goes to the welcom screen then you can unplug
-now the most inportant step Like my post
to enter download mode do this:
--You must switch off the device to start the process.
--Then press and hold the “Volume Up” and connect the USB cable from phone to PC.
--Use the original USB cable. Because, other device’s cable may not be detected in the Computer. So, only we recommend it to use the original-- one that you got it when you bought the phone.
--Wait for the driver installation on PC.
--Then you will get the download mode screen in your phone.
--That’s it.

I have the opposite problem, can't get into download mode haha
Sent from my LG-D855 using Tapatalk

suljo94 said:
I don't have the links to the tread where I got these from but lets just hope I don't get banned.
Click to expand...
Click to collapse
I can't find the .kdz file. I have the D85010d.
Also, i ran the original lg firmware, I also get an error saying it was unsuccessful or i may have keyed in something incorrect.
When I run perform the TOT method, I get the "device model is different".
So, d85010d was stock and I flashed sphinx d855... where they incompatible? im assuming no because the phone ran fine aside from the issue i stated on the original post.
would like more help.

Duhhrenn said:
I can't find the .kdz file. I have the D85010d.
Also, i ran the original lg firmware, I also get an error saying it was unsuccessful or i may have keyed in something incorrect.
When I run perform the TOT method, I get the "device model is different".
So, d85010d was stock and I flashed sphinx d855... where they incompatible? im assuming no because the phone ran fine aside from the issue i stated on the original post.
would like more help.
Click to expand...
Click to collapse
have you tried looking for it with the first link?
Sent from my LG-D855 using XDA Premium 4 mobile app

suljo94 said:
have you tried looking for it with the first link?
Sent from my LG-D855 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Okay, it installed but i'm stuck on the boot screen. Tried to do a factory reset, but it just loops right back to the boot screen.
But the installation completed. Does this mean I'm back to stock though and root is gone??

Same problem here with my LG G3 (F400L)
I tried everything TOT& DLL files KDZ Files no thing work for me.

I have the same problem im stuck in download mode and i cant find the kdz =O
I need to know if something can resolve this problem , my device is a lg g3 850 10 d and i installed the room sphinx for the lg D855 and was incompatible because the dialer did not work properly and try with original tot for my device and dont work with this method.. so i need the ORIGINAL KDZ for the lg G3 D850 10d know where to find???

Hey men you can find the solution of your issue?
Duhhrenn said:
Okay, it installed but i'm stuck on the boot screen. Tried to do a factory reset, but it just loops right back to the boot screen.
But the installation completed. Does this mean I'm back to stock though and root is gone??
Click to expand...
Click to collapse
i Have exactly the same problem of you... im istalling the sphinx room and try to back to stock in the 855 version and my version is 850 10 d and my phone get in a download mode don run anymore :crying:
You can ressolve finally the problem or what do you do with your phone????

Duhhrenn said:
So I was trying to unroot by using the Flashroot tool method. And now I'm stuck on download mode.
I have a d855. How do I unroot properly and how do I get out of the download mode.
Click to expand...
Click to collapse
I was in your position. Once you enter the download mode it is *almost* impossible to get out without removing the battery. I've heard a lot of suggestions like pressing the power button for 10 or 20 seconds or even doing that in combination with other keys, BUT the ultimate truth is that you have to press and keep holding power button for at least 1 minute. I didn't time exact seconds, but it was ridiculously long time. Probably it will take you less time removing the back and re-sit the battery, but personally I hate removing the back without serious reason
About the second question - I was unable to flash anything in LG's download mode. I'm using Ubuntu + virtualbox (Windows 7 inside), but due to issues with drivers and/or virtualbox and/or usb port forwarding I was unable to reliably connect and flash the stock kdz image. Fortunately I've sent the phone back to the LG repair office and they re-flashed the firmware for me.
---------- Post added at 04:46 PM ---------- Previous post was at 04:41 PM ----------
masmusica said:
so i need the ORIGINAL KDZ for the lg G3 D850 10d know where to find???
Click to expand...
Click to collapse
It is not exactly what you want, BUT at least you can get your latest, official KDZ file from LG.
Open in browser the following URL, but replace the xxxxxxxxx
http://csmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=xxxxxxxx
where xxxxxxxx is your IMEI number
As a result you'll get an XML file that will contain the location of your latest KDZ update, which should look something like this:
http://csmgdl.lgmobile.com/dn/downloader.dev?fileKey=.../D85510L_00.kdz

how to fix download mode
for all lg phones but if you are not lg user you can contact me for any phone software issues
try freepcforanything.blogspot
1. add .com at the end of the link
2. and choose software solution (right side you can see)
3. fix all software related issues.
---------- Post added at 04:16 PM ---------- Previous post was at 04:09 PM ----------
al-motamel said:
Same problem here with my LG G3 (F400L)
I tried everything TOT& DLL files KDZ Files no thing work for me.
Click to expand...
Click to collapse
you can try reinstall software and it will work for sure and also without loosing you data i can't send direct link cause i m new user
just follow the steps
1. open browser and type freepcforanything.blogspot+.in/2015/08/software-solution.html
2. copy link and past in address bar just remove + and enter

Solution- Lg G3 Stuck in download mode.
USE TOT as describes in given link. But using USB 2.0 , it works for me on korean ver. F400S. Don't use USB 3.0
forum.xda-developers.com/showthread.php?t=2785089

BioVolt said:
I have the opposite problem, can't get into download mode haha
Sent from my LG-D855 using Tapatalk
Click to expand...
Click to collapse
If you can't get in that, then something very serious happened!
you sure you can't enter it?
Otherwise, it would mean you messed up the bootloader!

Did you fix your phone?
al-motamel said:
Same problem here with my LG G3 (F400L)
I tried everything TOT& DLL files KDZ Files no thing work for me.
Click to expand...
Click to collapse
i am also having lg g3 F4ooL
installed cloudy g3
soft bricked
boot looping
when i enter into download mode
flashtool says an error that
*cant change to Download mode*
Download fail
what can i do?

Hi guys, i know it's an old post but i get the same issue.
I was following this tutorial https://linustechtips.com/main/topic/1058206-lg-g3-lineageos-tutorial/
I was on lollipop.
I initially downgraded to kitkat (V10e) using LG UP and then rooted with purple drake.
In the following reboots, "kernel error" occurred.
So I tried to flash the kitkat stock version again but without success.
I'm stuck in download mode and tried to flash both the kitkat version, the lollipop and the marshmallow, through .tot and .kdz, I tried both with LG UP, LG Flash tools v 1.8 and with LG flash Tools 2014 but in all cases unsuccessful because the phone reboots before it ends.
Now I don't know what to try anymore. Do you have any solution, please?
Thanks in advance.

LGUP unknown model and LG flashtool not working

Hi guys,
i recently use layers for my xenonhd rom (lg f400LL)
and then i reboot then boom it goes bootloop
what i have to do?i hardbrick my phone recently and i fix that by doing the shorwire method
but rightnow i use LGUP but it says that:
http://imgur.com/KTK9Vrb
i can still access download mode but i have problems on accessing the twrp recovery because it always boot on the bootloop,i mean
i have problems on using hardware keys to access twrp.
Sir pls help me

Stiffmeistro said:
Hi guys,
i recently use layers for my xenonhd rom (lg f400LL)
and then i reboot then boom it goes bootloop
what i have to do?i hardbrick my phone recently and i fix that by doing the shorwire method
but rightnow i use LGUP but it says that:
http://imgur.com/KTK9Vrb
i can still access download mode but i have problems on accessing the twrp recovery because it always boot on the bootloop,i mean
i have problems on using hardware keys to access twrp.
Sir pls help me
Click to expand...
Click to collapse
I didn't had the same issue as you, but had a similiar one (phone didn't get discovered neither by LGUP nor LG Flash Tool). Yesterday I fixed it by following this guide:
http://forum.xda-developers.com/showthread.php?t=2785089
In particular the part where you change your device to COM41 in the device manager.
After you get it discovered by LG Flash Tool flash an official KDZ.
Reboot the phone and connect it to your Windows, allow the connection from the phone screen.
It should promt you to install drivers on the computer, do that (they are different from LG Drivers you download from the web mind you)
Now you can change your COM port back to 3 and everything should be fully discoverable by both LGUP and LG Flash Tool.

I think I replied to you on reddit (same photo) Have you tried plugging the phone in while in download mode ? Did you try installing drivers from the internet ? Coz thats how I fixed the same problem you have.

Fluffywolf said:
I think I replied to you on reddit (same photo) Have you tried plugging the phone in while in download mode ? Did you try installing drivers from the internet ? Coz thats how I fixed the same problem you have.
Click to expand...
Click to collapse
engmia said:
I didn't had the same issue as you, but had a similiar one (phone didn't get discovered neither by LGUP nor LG Flash Tool). Yesterday I fixed it by following this guide:
http://forum.xda-developers.com/showthread.php?t=2785089
In particular the part where you change your device to COM41 in the device manager.
After you get it discovered by LG Flash Tool flash an official KDZ.
Reboot the phone and connect it to your Windows, allow the connection from the phone screen.
It should promt you to install drivers on the computer, do that (they are different from LG Drivers you download from the web mind you)
Now you can change your COM port back to 3 and everything should be fully discoverable by both LGUP and LG Flash Tool.
Click to expand...
Click to collapse
Hey Bro'ssss
now i am stuck on the recovery
i always flash the rom but when i boot it always go to the recovery(twrp)

Stiffmeistro said:
Hey Bro'ssss
now i am stuck on the recovery
i always flash the rom but when i boot it always go to the recovery(twrp)
Click to expand...
Click to collapse
The method I'm describing uses Download Mode so it should work for you.. Try it and tell us the result

engmia said:
The method I'm describing uses Download Mode so it should work for you.. Try it and tell us the result
Click to expand...
Click to collapse
Thanks man its all ok now
i dont have time to explained what i did but it works
Many thanks to all of you

hey guys, LGUP will not see my phone at all(LGV10) its in download mode , but does not come up. its stuck on LG boot screen and wont go past it. any help would be appreciated... I am, or was rooted anyway, and trying to reflash again. need to in order to fix it now. thanx

1SouthernCanuck said:
hey guys, LGUP will not see my phone at all(LGV10) its in download mode , but does not come up. its stuck on LG boot screen and wont go past it. any help would be appreciated... I am, or was rooted anyway, and trying to reflash again. need to in order to fix it now. thanx
Click to expand...
Click to collapse
Just read over the thread, it's what it's here for.

Stiffmeistro said:
i dont have time to explained what i did but it works
Click to expand...
Click to collapse
You asked for other people's time to help you, but now you don't have time to explain how you made it work?
Yeah... there MIGHT be other people with the same problem, but why would you care to share.
What an as*hole you are. Another typical new buttuser ruining a great dev community.

exactly
leandeganis said:
You asked for other people's time to help you, but now you don't have time to explain how you made it work?
Yeah... there MIGHT be other people with the same problem, but why would you care to share.
What an as*hole you are. Another typical new buttuser ruining a great dev community.
Click to expand...
Click to collapse
Exactly, here I am running around in circles over this BOOST Stylo 2, just got it with MM 6.0.1 out of the box 2 days ago. I caught the 454.4mb update it has been trying to do! Got that baby downloaded! 1.02gb unzipped and renamed to kdz. Got a script for Terminal that will replace Kingroot's temp root with SuperSU but I am not going to attempt any further until I know LGUP will recognize and flash my .zip the bas****s deem not worth enough to put up for download on LG's site!
I got LGUP to recognize it in download mode, reads out LGLS775 but still says it cannot open it...............
His info on how he got it to work would prolly have solved this dillema..............
oh well
zach

ok had a LG G3 that's done this- as long as you can get download mode it should recover, YOU need to use the LG mobile support tool from LG website ( LG UP sees phone as unknown model ) run LG mobile Support tool and in option choose UPGRADE RECOVERY . follow instructions and allow to start process, it took 57 minutes to repair my phone - it will seem frozen anywhere from 0% to about 22% JUST WAIT IT OUT!! lg up / twrp flashes in 5 to 10 mins -- the LG m.s.t writes block by block and takes 1 hour +
so hints and info took 3 goes to find and start upgrade recovery - error on a couple of attempts. phone seems frozen around 10% and 15% of firmware upload -- go make a coffee drink it, go pee then come back and worry! A watched pot never boils!....

Stiffmeistro said:
Thanks man its all ok now
i dont have time to explained what i did but it works
Many thanks to all of you
Click to expand...
Click to collapse
please tell me how to solved your problem my D682 deivce is always opening on recovery but there is no recovery menu just android robot

I have same issue as op described .After unbrick my g3 f400s by short wire method i get error at 94% in tot method and red screen show these word error wrong qem =0 .After remove and put battery again mobile runing but without baseband and null imei .Plz help i need really help

Same here. LGUP Says it is not recognized, even if it says it's a LG G3 855... Trying the LG Mobile Support Tools -> UPGRADE RECOVERY using my Model/serial.
Downloading right now...
Hope it works.
I will tell you when/if I got it to work
Also: Stiffmeistro you're a ****...
---------- Post added at 03:33 AM ---------- Previous post was at 03:22 AM ----------
Sedado77 said:
Same here. LGUP Says it is not recognized, even if it says it's a LG G3 855... Trying the LG Mobile Support Tools -> UPGRADE RECOVERY using my Model/serial.
Downloading right now...
Hope it works.
I will tell you when/if I got it to work
Also: Stiffmeistro you're a ****...
Click to expand...
Click to collapse
It didn't. It's EVEN MORE broken :'(

I figured out how to get my PC to recognize my D851. Apparently all the LG software didn't like how many COM ports I have. As soon as I unplugged everything else from my PC, the software worked. In this case, it was LG Flash Tool 2014, but I couldn't get any of them to work before.

Try running LGUP as Admin!!! For me it worked!
Try running LGUP as Admin!!! For me it worked!

Thankx Bro Its Work
engmia said:
The method I'm describing uses Download Mode so it should work for you.. Try it and tell us the result
Click to expand...
Click to collapse

Hope someone can help me. I flashed a rom for a d855, d855g30 I think, and although I can access download mode all aps for flashing fail saying it's the wrong model number. Even the generic DLL file cant trick it. It still starts booting the rom but boot loops before entering. I no longer have twrp and when I try to do safe mode or factory reset I get a boot validation error or something similar. Just seem to be stuck. Im using a VS985.

One cause of LGUP "UNKNOWN"
While an old thread, it'll be found in searches. For anybody who gets "UNKNOWN" device with LGUP for the LG G3, I found that LGUP for the G3 is often distributed with the wrong DLL file. See the details here, post #11. After installing LGUP, make sure that the "model" subdirectory in the LGUP program directory is the same number as the processor in your phone, in my case c:\Program Files (x86)\LG Electronics\LGUP\model\8974 (was 8994 with the "LGUP for G3" I downloaded).
HTH

something between soft brick and hard brick

Hey guys,
I have lg g3 d855 it was with lolipop v21a (TWN version) and now I kinda of destroyed it when I flashed a marshmallow rom for hong kong lg g3 d 858HK(wish i had know that earlier) ,
so what i currently have is a phone with no wifi or signal ( so no way of connecting to internet) and it is not recognized by computer ... I can enter download mode but still i get the error usb device not recognized
any idea or suggestion of how to fix it ? or is it hard bricked ?

any idea any one please ? :crying:

patrs63 said:
any idea any one please ? :crying:
Click to expand...
Click to collapse
please ?

so its lost, how can I close thread ?

patrs63 said:
so its lost, how can I close thread ?
Click to expand...
Click to collapse
It's probably not lost, but you'll need to get to work & it is a mild pain in the a** to do so...
https://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359
Dont mind the sprint variant, just use the proper files for your phone this time around
I brought a phone up last week via this method. The hardest part is getting the phone to show up as qualcomm 9008 & to communicate with it(need the proper drivers and need a good cable). It can be a little tricky, but once you figure that part out the flashing part is easy.
*The method I linked above should be considered a last resort.*
But I thought you posted you can get into download mode earlier, so make sure your computer isn't the issue. Uninstall all lg drivers & reinstall them. If you have download mode/firmware update displayed on your phone screen and it shows up as lge serial port(or something like that) in device manager you should just be able to TOT or KDZ your stock firmware. I believe there are instructions for that in the link as well; if not - google is your friend.
Gd luck:good:

startswithPendswithOOH said:
It's probably not lost, but you'll need to get to work & it is a mild pain in the a** to do so...
https://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359
Dont mind the sprint variant, just use the proper files for your phone this time around
I brought a phone up last week via this method. The hardest part is getting the phone to show up as qualcomm 9008 & to communicate with it(need the proper drivers and need a good cable). It can be a little tricky, but once you figure that part out the flashing part is easy.
*The method I linked above should be considered a last resort.*
But I thought you posted you can get into download mode earlier, so make sure your computer isn't the issue. Uninstall all lg drivers & reinstall them. If you have download mode/firmware update displayed on your phone screen and it shows up as lge serial port(or something like that) in device manager you should just be able to TOT or KDZ your stock firmware. I believe there are instructions for that in the link as well; if not - google is your friend.
Gd luck:good:
Click to expand...
Click to collapse
well my computer is not the problem since i tried 2 or 3 other computers and few other cables , still no luck recognizing it in download mode ... so i guess ill go for the qualcomm method :/
but what exactly does shortining the pen mean ? and is there a video for that ?

Bricked lg g3 need help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

so i wanted to flash fulmics rom on my brand new lg g3 (p.s my old one wouldnt charge) but when i flashed my d852 bell firmware on it via LGUP my went back from getting a drink and my lg g3 was stuck on an android with a thing in its chest spinning and its just stuck there i tried all programs even with a bell marshmallow kdz and it says (lg flash tool and LGUP tot method) communication fail with device and on lg flash tool 2014 kdz method it just fails and i did confirm that nothing was wrong with my hardware and software and is there an alternative my goal is to flash twrp with download mode, wipe the system and flash a rom but how? i also dont want to take it back or take it to a shop i want to do this all on my own and i need your guys help. god bless you if you help me fix this. thanks
-moreogthanu p.s its a very old name

does anything show up in device manager when you plug it in?

yes its hows up lgeandroid net usb something... the normal stuff

moreogthanu said:
yes its hows up lgeandroid net usb something... the normal stuff
Click to expand...
Click to collapse
i meant LGE mobile usb serial port (com7) and in portable devices its says LGE android MTP device and its has a yellow trangle

so does anything show up when you turn it on? how far does it get in booting? it goes to DL mode everytime? and that's what is in device manager in DL mode?

paujmos said:
so does anything show up when you turn it on? how far does it get in booting? it goes to DL mode everytime? and that's what is in device manager in DL mode?
Click to expand...
Click to collapse
it boots into dl mode but i cant flash firmware yesterday i recorded it. it boots to lg logo and after 29 seconds it boot to the android guy i did find something in yellow text but it flickers and that says. in short
E: failed to mount /cache (no such file or directory) then can't mount /cache/recovery/log
can't open /cache/recovery/log
and it repeats that text 3 times from what i saw

did you install twrp? i would check your drivers or the cable for the communication failure in dl mode

paujmos said:
did you install twrp? i would check your drivers or the cable for the communication failure in dl mode
Click to expand...
Click to collapse
My goal is to try and install TWRP my phone fully stock I checked everything even my charging port. I'm using the lg cable... My main goals are to get this fixed before March 3 and all I need is an alternative. Get TWRP or return back to stock

at least give me a script to boot to stock android recovery without adb. cause obviously i cant use adb and i hope anybody reading this can remember that with lg flash tool 2014 kdz method it goes to 4 and stops unless you guys find fix to that. all i need is to get this thing fixed before march 3rd. so if you guys help me find any kind of fix this is all i need
here is info but my phone
model: lg-d852 (don't really need it though)
status: stock unrooted device and has never booted into the system
android version: 4.4.2 kitkat
main problem that needs to be fixed: it cant mount cache cause apparently there is no file or directory according to my phone
that's it. if you guys need anymore info about my phone let me know (except imei or serial number cause that's all private stuff) thanks
-moreogthanu it's a very old name

use the tot method. never seen it not work assuming youre in download mode and have working drivers/cable

paujmos said:
use the tot method. never seen it not work assuming youre in download mode and have working drivers/cable
Click to expand...
Click to collapse
I used every method

then you must force it into the 9008 mode using the following guide. I would check the dll you are using, drivers, or cable first through. I would be EXTREMELY SUPRISED of a g3 in DL mode that is non-responsive.
https://forum.xda-developers.com/verizon-lg-g3/general/how-to-hardbrick-guide-using-test-t3276928

paujmos said:
use the tot method. never seen it not work assuming youre in download mode and have working drivers/cable
Click to expand...
Click to collapse
girlfriend took my phone somewhere to fix it if she comes back with no results i'll update you

moreogthanu said:
girlfriend took my phone somewhere to fix it if she comes back with no results i'll update you
Click to expand...
Click to collapse
i'm surprised that my lg g3 in download mode with the correct dll, tot, kdz. every single program with a fully working charging port and an lg cable is that unresponsive. although at one point the arrows in download mode started spinning an then it stopped and on the monitor it said on lg flash tool (tot method). CAUTION: Primary gpt has invalid value there must be something blocking the connection
oh and my phone is still getting fixed soooooooooo no updates just yet. but like i said if there are no results i'll update you

Please help me buddies!

Hello there pals, I have a problem, I have an Lg H815P (Mexico Version), and i was using it normally for about 15 days, then suddenly the home screen freezed, and then the phone restarted, i thougt it was just a lagging issue, but then, when the phone booted up again, after like 5 secs it freezed up again and restart, a infinte loop, then i said, this Rom must be corrupted (Stock TELCEL Rom v20b Android MM), and decided to do a hardware keys factory reset, then the phone restarted but when it was android upgrading apps, it kept restarting, at last it booted up but the problem persist. So im kinda worried, how a problem cant be fixed at a full hard reset? When im trying to flash a KDZ file From lg flash tool, the program fails because cant find phone, a kinda weird thing because the adb detects it sometimes, others not, i booted the phone in safe mode and the problem persist anyway, what can I do? I already have the drivers, the lg up, and the lg bridge apps, they all said that im running the last software for my mobile device, i´ve tried another battery as well, so im kinda lost, another thing, after the hard reset, the phone was able to stay on like 15 mins, sometimes 5, sometimes just secs, dunno what is happening but i really need some ideas, can you help me to work this out?
Greetings pals!

Delintg2 said:
Hello there pals, I have a problem, I have an Lg H815P (Mexico Version), and i was using it normally for about 15 days, then suddenly the home screen freezed, and then the phone restarted, i thougt it was just a lagging issue, but then, when the phone booted up again, after like 5 secs it freezed up again and restart, a infinte loop, then i said, this Rom must be corrupted (Stock TELCEL Rom v20b Android MM), and decided to do a hardware keys factory reset, then the phone restarted but when it was android upgrading apps, it kept restarting, at last it booted up but the problem persist. So im kinda worried, how a problem cant be fixed at a full hard reset? When im trying to flash a KDZ file From lg flash tool, the program fails because cant find phone, a kinda weird thing because the adb detects it sometimes, others not, i booted the phone in safe mode and the problem persist anyway, what can I do? I already have the drivers, the lg up, and the lg bridge apps, they all said that im running the last software for my mobile device, i´ve tried another battery as well, so im kinda lost, another thing, after the hard reset, the phone was able to stay on like 15 mins, sometimes 5, sometimes just secs, dunno what is happening but i really need some ideas, can you help me to work this out?
Greetings pals!
Click to expand...
Click to collapse
I have had this problem occur because of the launcher. Try cleaning the cache and data and see whether an updated version is available. You could also try a 3rd party one and see if that helps or simply re-install the LG launcher.
If no luck, you could try flashing another kdz with LGUP-NEW: https://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
There are a couple of TCL kdz's listed on this site: https://lg-firmwares.com/lg-h815p-firmwares/
Scroll sown to LG H815P Firmware List.
Back up everything first.

sdembiske said:
I have had this problem occur because of the launcher. Try cleaning the cache and data and see whether an updated version is available. You could also try a 3rd party one and see if that helps or simply re-install the LG launcher.
If no luck, you could try flashing another kdz with LGUP-NEW: https://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
There are a couple of TCL kdz's listed on this site: https://lg-firmwares.com/lg-h815p-firmwares/
Scroll sown to LG H815P Firmware List.
Back up everything first.
Click to expand...
Click to collapse
Ty pal, I´ve tried with nova launcher, but no dice, still restarting, perhaps because i cant disable lg launcher from apps menu, actually i´ve been trying with flashtool and kdz files but i think the program doesnt recognize phone, cuz it show the message in lg mobile support tool: error required info cannot be found, contact administrator. I have the drivers, the pc in download mode and connected to pc, full charged, what else im missing?

Delintg2 said:
Ty pal, I´ve tried with nova launcher, but no dice, still restarting, perhaps because i cant disable lg launcher from apps menu, actually i´ve been trying with flashtool and kdz files but i think the program doesnt recognize phone, cuz it show the message in lg mobile support tool: error required info cannot be found, contact administrator. I have the drivers, the pc in download mode and connected to pc, full charged, what else im missing?
Click to expand...
Click to collapse
seems to me that you got the bootloop.
send it to repair if warranty.. if not try LG mexico.

Delintg2 said:
Ty pal, I´ve tried with nova launcher, but no dice, still restarting, perhaps because i cant disable lg launcher from apps menu, actually i´ve been trying with flashtool and kdz files but i think the program doesnt recognize phone, cuz it show the message in lg mobile support tool: error required info cannot be found, contact administrator. I have the drivers, the pc in download mode and connected to pc, full charged, what else im missing?
Click to expand...
Click to collapse
Make sure you are using the correct LG Mobile Driver on your PC: LGMobileDriver_WHQL_Ver_4.2.0
If you are using the drivers your PC installs, you will have issues. Check in Device Manager on your PC.
Use LGUP-NEW to install a kdz.

sdembiske said:
Make sure you are using the correct LG Mobile Driver on your PC: LGMobileDriver_WHQL_Ver_4.2.0
If you are using the drivers your PC installs, you will have issues. Check in Device Manager on your PC.
Use LGUP-NEW to install a kdz.
Click to expand...
Click to collapse
Delintg2 said:
Ty pal, I´ve tried with nova launcher, but no dice, still restarting, perhaps because i cant disable lg launcher from apps menu, actually i´ve been trying with flashtool and kdz files but i think the program doesnt recognize phone, cuz it show the message in lg mobile support tool: error required info cannot be found, contact administrator. I have the drivers, the pc in download mode and connected to pc, full charged, what else im missing?
Click to expand...
Click to collapse
sdembiske said:
I have had this problem occur because of the launcher. Try cleaning the cache and data and see whether an updated version is available. You could also try a 3rd party one and see if that helps or simply re-install the LG launcher.
If no luck, you could try flashing another kdz with LGUP-NEW: https://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
There are a couple of TCL kdz's listed on this site: https://lg-firmwares.com/lg-h815p-firmwares/
Scroll sown to LG H815P Firmware List.
Back up everything first.
Click to expand...
Click to collapse
I found the correct drivers and installed a DLL for lg up, so the program now detects my phone, the problem is that i install as Refurbish the same version that i was running, the h815p v20a, but when it finishes it says rebooting, but in the device is boot looped at lg logo and powered by android, the phne used to boot and show desktop, now is bootlooped, what else can I do to make him boot?
Cheers buddies

Delintg2 said:
I found the correct drivers and installed a DLL for lg up, so the program now detects my phone, the problem is that i install as Refurbish the same version that i was running, the h815p v20a, but when it finishes it says rebooting, but in the device is boot looped at lg logo and powered by android, the phne used to boot and show desktop, now is bootlooped, what else can I do to make him boot?
Cheers buddies
Click to expand...
Click to collapse
If the phone is still recognized on your PC, see if you can get into download mode. If you can, try re-installing the KDZ from there. Make double sure it is the same kdz that was installed on your phone when it worked.
The other option is to see if you can get into recovery mode and try a factory reset.
It is possible that the freezing you were experiencing before when it booted up was, as raptordd suggested above in post #4, an early sign of the hardware bootloop issue that has now manifested fully. The only real option then is to send it in to LG for repair and tell them your phone, you believe, has developed the hardware bootloop issue. Even if out of official warranty, they should replace the motherboard in that case, at no cost to you.

sdembiske said:
If the phone is still recognized on your PC, see if you can get into download mode. If you can, try re-installing the KDZ from there. Make double sure it is the same kdz that was installed on your phone when it worked.
The other option is to see if you can get into recovery mode and try a factory reset.
It is possible that the freezing you were experiencing before when it booted up was, as raptordd suggested above in post #4, an early sign of the hardware bootloop issue that has now manifested fully. The only real option then is to send it in to LG for repair and tell them your phone, you believe, has developed the hardware bootloop issue. Even if out of official warranty, they should replace the motherboard in that case, at no cost to you.
Click to expand...
Click to collapse
Now that u mention that, the phone was recognized by pc, but i installed a lot of kdzs, and none of them made the phone boot, every one of them were for h815p v20a, the one that was installed, but now i connect it to pc and then says download mode but doesnt enter and then the lg logo appears again, even the charge is meesed up now, i think i screwed the download mode and the charge mode, is that possible? but i tried the factory reset when i had the working firmware but the problem persists. Now im thinkin my only option is to use a octoplus box to revive it, but dunno if that will fix the restart problem, about that warranty stuff, i can send it to lg mexico and they should change my motherboard for free? That sound too good to be true.
Salute! pals

Delintg2 said:
Now that u mention that, the phone was recognized by pc, but i installed a lot of kdzs, and none of them made the phone boot, every one of them were for h815p v20a, the one that was installed, but now i connect it to pc and then says download mode but doesnt enter and then the lg logo appears again, even the charge is meesed up now, i think i screwed the download mode and the charge mode, is that possible? but i tried the factory reset when i had the working firmware but the problem persists. Now im thinkin my only option is to use a octoplus box to revive it, but dunno if that will fix the restart problem, about that warranty stuff, i can send it to lg mexico and they should change my motherboard for free? That sound too good to be true.
Salute! pals
Click to expand...
Click to collapse
See if you can enter recovery using the hardware buttons and try executing it again.
LG has been replacing motherboards in a lot of cases where the issue is attributable to their own hardware issue (ILAPO). You don't really want to discuss the things you have done to get it working again with them ... if you get my drift, i.e., play dumb ...

sdembiske said:
See if you can enter recovery using the hardware buttons and try executing it again.
LG has been replacing motherboards in a lot of cases where the issue is attributable to their own hardware issue (ILAPO). You don't really want to discuss the things you have done to get it working again with them ... if you get my drift, i.e., play dumb ...
Click to expand...
Click to collapse
Ok if none of the baove works, ill do that, but no, it has no recovery neither, not even stock, i read about a bootloader way to fix the download mode, im gonna try that but i doubt i can cuz bootloader is factory locked cuz is latin version.

No luck at all, phone is still bricked, is there any way to flash stuff via bootloader or abd without bootloader unlocked or root?