Database Develop

How to flash ROMs at O4X

If some one has a tutorial "How to flash ROM at Optimus 4x " please use this space to share it with us.
I Have the V09a and I would like to flash V10b. The original upgrade tools does not work.
Is the any other way to do that?

denisdornelas said:
If some one has a tutorial "How to flash ROM at Optimus 4x " please use this space to share it with us.
I Have the V09a and I would like to flash V10b. The original upgrade tools does not work.
Is the any other way to do that?
Click to expand...
Click to collapse
you need the lg pc suite to update with. get it here
install it and connect your mobile to the pc using the usb cable.
remember to connect the usb cable between mobile and pc BEFORE you turn on the mobile.
if you do not do it correctly, the S/W upgrade menu will not appear, and update might fail (which i believe you seen now?)
(hold VOL- pressed, when you turn on the mobile, and S/W upgrade will appear, otherwise try again)
from here, the pc suite will guide you through the upgrade. i might be missing that you need to select mobile upgrade from the menu, but that is just a matter of selecting it

Dexter_nlb said:
you need the lg pc suite to update with. get it hereinstall it and connect your mobile to the pc using the usb cable.
remember to connect the usb cable between mobile and pc BEFORE you turn on the mobile.
if you do not do it correctly, the S/W upgrade menu will not appear, and update might fail (which i believe you seen now?)
(hold VOL- pressed, when you turn on the mobile, and S/W upgrade will appear, otherwise try again)
from here, the pc suite will guide you through the upgrade. i might be missing that you need to select mobile upgrade from the menu, but that is just a matter of selecting it
Click to expand...
Click to collapse
When I plug the usb cable on my phone it automatically turnes on the prone. Any other way?

you have to hold down the VOL- when you that trick, and fast. there is just this way.

Dexter_nlb said:
you need the lg pc suite to update with. get it here
install it and connect your mobile to the pc using the usb cable.
remember to connect the usb cable between mobile and pc BEFORE you turn on the mobile.
if you do not do it correctly, the S/W upgrade menu will not appear, and update might fail (which i believe you seen now?)
(hold VOL- pressed, when you turn on the mobile, and S/W upgrade will appear, otherwise try again)
from here, the pc suite will guide you through the upgrade. i might be missing that you need to select mobile upgrade from the menu, but that is just a matter of selecting it
Click to expand...
Click to collapse
Is it still works? I activate S/W upgrade but LG PC Suite dont do nothing and "Device"=>"Device software upgrade" still inactive.
My ROM is v10a, should it work?

m0b said:
Is it still works? I activate S/W upgrade but LG PC Suite dont do nothing and "Device"=>"Device software upgrade" still inactive.
My ROM is v10a, should it work?
Click to expand...
Click to collapse
I suggest you to follow this guide http://forum.xda-developers.com/showthread.php?t=1264289
The only two different things are that you have to download and select the proper kdz for ours p880 and also insert the battery between fourth and fifth step ( when you reached the s/w upgrade mode ), otherwise the flash won't finish ( at least, for me it was so ).
PS: obviously in step 4 you have to keep pressed "vol-" and, at the same time, plug in the usb cable.

eskamhl said:
PS: obviously in step 4 you have to keep pressed "power" + "vol-" and, at the same time, plug in the usb cable.
Click to expand...
Click to collapse
i can confirm when you connect the USB cable you only need to keep VOL- kept down and do it within 2-3 seconds or it will not boot up.
but power button is not needed for f/w upgrade mode.

yeah, I did not remember exactly if i pressed the power button or not

Is that all? Download LG PC suite and then connect USB? I tried that and got the S/W upgrade please wait while upgrading... but its taking forever.
ps: this is my first time rooting/flashing a phone.

hi there
here the same try to update after root using the lg software and it takes hours ....
is it possible to update normal after rooting??

moyer said:
hi there
here the same try to update after root using the lg software and it takes hours ....
is it possible to update normal after rooting??
Click to expand...
Click to collapse
root kills OTA updates

Dexter_nlb said:
root kills OTA updates
Click to expand...
Click to collapse
but with pc and datacable its possible, or?

yes it is

Hmm, tried updating with LG software, didn't work. Then I tried the method explained here:
http://forum.xda-developers.com/showthread.php?t=1264289
and it got to
wParam=2010,IParam=18
and it has been stuck there since 10-15 minutes.
I am trying to update a sample with a pre-release firmare (V09b) from March 28 to the European V10 KDZ file. Any suggestions? Thx!
Update: I pulled the plug after it has been stuck at the same point for more then 30min, it updated the baseband to V10B, but the software version is still V09B...Damn....

Dexter_nlb said:
root kills OTA updates
Click to expand...
Click to collapse
Out of curiosity: Why does it? Sounds strange, that just an su binary and superuser access changes anything related to upgrading?

Same here, anyone help us?
TechGR said:
Hmm, tried updating with LG software, didn't work. Then I tried the method explained here:
http://forum.xda-developers.com/showthread.php?t=1264289
and it got to
wParam=2010,IParam=18
and it has been stuck there since 10-15 minutes.
I am trying to update a sample with a pre-release firmare (V09b) from March 28 to the European V10 KDZ file. Any suggestions? Thx!
Update: I pulled the plug after it has been stuck at the same point for more then 30min, it updated the baseband to V10B, but the software version is still V09B...Damn....
Click to expand...
Click to collapse
The same error here, and my phone is a developer edition? How to solve it? Can you flash the rom sucessfully?

I invite you to test the tool which downloads the original KDZ file to your phone P880. Especially those who have the DEVELOPER VERSION.
How to use?
Well, In the top field, put the model in this case, LGP880.
In the field below, enter the number of the IMEI (This code is located behind the device, removing the battery you can see a white sticker with a number)
Whoever can download the KDZ, give an answer here. I have a device developer version, I and my colleague are testing whether there are differences between versions of files KDZ developer of the definitive versions.
Please DO NOT try flashing the rom until I can test it, my phone is already bricked, if it works for me, then I'll tell you.
Download the program here:
http://forum.xda-developers.com/attachment.php?attachmentid=592871&d=1305116848

Hmm, I tried the app but it does not seem to find anything for me...

I contacted LG Singapore stating that bought the device but was not able to update the device. Informed that the upgrade tool showed the error. I asked to check the IMEI of my device. Maybe they release the update, if this process succeeds, simply register the device by LG. I may be talking nonsense, but it never hurts to try.
Sent from my LG-P990 using xda app-developers app

The problem is if they will offer suport for developers device (not for commercial use) or not.

[Q] 6 Hours later = Brick... Official LG ICS [SOLVED]

Hey everyone.
I have the LG Thrill (P925) from AT&T. I'm used to changing roms and trying new things.
Well today I get a text from AT&T saying ICS is out, so I go and download the LG Mobile Support Tool
like the text says. The first few times don't work. I got stuck at the LG boot logo. (I didn't wipe the phone before.)
So I wait an hour to 1.5 hours. Still nothing. I try again and search the forums while I wait. Someone says to try using XP.
So I try in XP mode under Win 7. Everything is going well up until 90%. It does the whole driver disconnected sound as per normal
but then it happens. My phone starts up and shows the LG logo for 3/4ths of a second and then restarts (Black screen for 2 seconds) and
then repeats the whole process over again. What can I do?
(EDIT: Almost forgot: I was on CM7 when I tried to go to Official ICS)
All from the official LG tool...
SOLVED
After trying a few things I held the Volume up button and the power button to get it recognized by the computer. Then
I found a different copy of the LG Mobile support tool than what was on their site. I used the recovery phone option and it worked!
Hopefully this will help someone. I'll post where I got the tool soon.

Could you please give a link or tell me where you got the other lg mobile support tool. Because everything was going good for me and my phone restarted after it was done updating. But when it restarted it got hung up at the att animation and it just stays there... The way I got the official lg mobile support tool to recognize my phone was to put it into download mode also.

I got the KDZ_Flashing_Software.zip from this post: http://forum.xda-developers.com/showthread.php?t=2191698
Install the msxml from the zip then you can use the B2CAppSetup program.
Hope it helps.
uberlight25 said:
Could you please give a link or tell me where you got the other lg mobile support tool. Because everything was going good for me and my phone restarted after it was done updating. But when it restarted it got hung up at the att animation and it just stays there... The way I got the official lg mobile support tool to recognize my phone was to put it into download mode also.
Click to expand...
Click to collapse

uberlight25 said:
Could you please give a link or tell me where you got the other lg mobile support tool. Because everything was going good for me and my phone restarted after it was done updating. But when it restarted it got hung up at the att animation and it just stays there... The way I got the official lg mobile support tool to recognize my phone was to put it into download mode also.
Click to expand...
Click to collapse
Did these suggestions work for you? I'm in the same spot (frozen at&t logo). I've tried recovery phone several times to no avail. Trying one last time hoping for a miracle.
I was running a acidhazardrom gingerbread rom before attempting to update to latest official ICS. Any other suggestions would be appreciated.

byetimmy said:
Did these suggestions work for you? I'm in the same spot (frozen at&t logo). I've tried recovery phone several times to no avail. Trying one last time hoping for a miracle.
I was running a acidhazardrom gingerbread rom before attempting to update to latest official ICS. Any other suggestions would be appreciated.
Click to expand...
Click to collapse
You should probably boot into stock recovery....do it the same way you boot into CWM .....and do all the wipes it should boot then

malebornin69 said:
You should probably boot into stock recovery....do it the same way you boot into CWM .....and do all the wipes it should boot then
Click to expand...
Click to collapse
I only got to a menu to wipe my device once. I tried many times and the time I got to it it only had one option which didn't seem to help.
byetimmy: Did you try using the tool I suggested in my post?

Jackelope said:
I only got to a menu to wipe my device once. I tried many times and the time I got to it it only had one option which didn't seem to help.
byetimmy: Did you try using the tool I suggested in my post?
Click to expand...
Click to collapse
I found out what I did wrong. I didn't uninstall the version of the LG Support Tool before using the one specified in your first post. I removed the original LG support tool and used the one you found and it worked.
Thanks for your help.

byetimmy said:
I found out what I did wrong. I didn't uninstall the version of the LG Support Tool before using the one specified in your first post. I removed the original LG support tool and used the one you found and it worked.
Thanks for your help.
Click to expand...
Click to collapse
Glad to help.

I know it's something I did, probably the custom image I had running, but the LG Support Tool totally borked my phone. My Thrill would only stay on for a split second, and would continuously boot cycle when plugged into USB. The boot cycle was so fast that half the time it wouldn't even get to the LG logo!
Fixed it with fastboot (omap4boot) and SmartFlash Tool. What a nightmare. Only good thing is I was able to flash from BIN file directly to ICS.

PyroTech76 said:
I know it's something I did, probably the custom image I had running, but the LG Support Tool totally borked my phone. My Thrill would only stay on for a split second, and would continuously boot cycle when plugged into USB. The boot cycle was so fast that half the time it wouldn't even get to the LG logo!
Fixed it with fastboot (omap4boot) and SmartFlash Tool. What a nightmare. Only good thing is I was able to flash from BIN file directly to ICS.
Click to expand...
Click to collapse
Thanks for your help too. Obviously these issues stem from the fact that we used custom roms on the Thrill. It doesn't help that the LG Tools are complete software crap.

byetimmy said:
Did these suggestions work for you? I'm in the same spot (frozen at&t logo). I've tried recovery phone several times to no avail. Trying one last time hoping for a miracle.
I was running a acidhazardrom gingerbread rom before attempting to update to latest official ICS. Any other suggestions would be appreciated.
Click to expand...
Click to collapse
I encountered the same problem as you.
LG Support Tool too bad.
maybe I will update the rom using the bin file.

guys please help! i was running on ICS(official)...... i tried fixing kernel key with OS hacking method and now the phone is bricked!i can still access CWM though! when i use the LG mobile support tool, it gets stuck here

PyroTech76 said:
I know it's something I did, probably the custom image I had running, but the LG Support Tool totally borked my phone. My Thrill would only stay on for a split second, and would continuously boot cycle when plugged into USB. The boot cycle was so fast that half the time it wouldn't even get to the LG logo!
Fixed it with fastboot (omap4boot) and SmartFlash Tool. What a nightmare. Only good thing is I was able to flash from BIN file directly to ICS.
Click to expand...
Click to collapse
how and where did you get the files to do that? im stuck at the lg screen after trying to do the ics update

spinks420 said:
how and where did you get the files to do that? im stuck at the lg screen after trying to do the ics update
Click to expand...
Click to collapse
From this thread I used "omap4boot-for_optimus-v1.21"
http://forum.xda-developers.com/showpost.php?p=33628316&postcount=1
Good luck my LG Thrill brethren!

PyroTech76 said:
From this thread I used "omap4boot-for_optimus-v1.21"
http://forum.xda-developers.com/showpost.php?p=33628316&postcount=1
Good luck my LG Thrill brethren!
Click to expand...
Click to collapse
noope still stuck at the lg screen

[Q] Brick after lg mobile support tool and kdz update

Well it's not the first time i switch roms on my optimus 4x, but this time i've been banging my head against the wall for more than 6 hours trying to figure out what's wrong. So the phone was running CM 10.1 for about 2 months and i wanted to return to the stock jelly bean, i used the kdz update method exactly as shown in here http://forum.xda-developers.com/showthread.php?t=2069723. I tried it a couple of times, and each time the phone reboots and gets stuck at LG boot animation. So i tried to use the official LG mobile support tool and use the upgrade recovery method, it downloads the firmware and installs it to the phone but the same happens, the phone reboots and gets stuck at the boot animation. I've tried the kdz method about 3 times again to ensure i did everything right, then tried the LG mobile support tool for a last time and just the same happens. Now i'm enable to open the phone. I can still get to S/W upgrade mode though. So i really need help here because i've tried everything i know and failed, i need to get my phone functional again ASAP. Thanks.

@difovo
When you flash KDZ most of the Times you get bootlop just do a hard reset in recovery and you are good to go.
The same thing is also mentioned almost at the end of that post.
Sent from my LG-P880 using XDA Premium 4 mobile app

Thanks sPEADy, actually that was the last thing i did before going to bed and the phone started normally. Thanks again for your help.

difovo said:
Thanks sPEADy, actually that was the last thing i did before going to bed and the phone started normally. Thanks again for your help.
Click to expand...
Click to collapse
I am having excactly the same probem and i cannot had reset any heple pls!?

soft brick stuck in sw recovery

hi all. iv got my p880 stuck in sw upgrade mode. lg mobile support tool and kdz flasher both fail at 10% every time. iv tried every variation i can find and no luck.

gerrymcgin said:
hi all. iv got my p880 stuck in sw upgrade mode. lg mobile support tool and kdz flasher both fail at 10% every time. iv tried every variation i can find and no luck.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2069723

hi kingrz
i have tried this method as well as a few others. they all fail. the phone is recognized but the flash never completes. even in lg mobile support it fails at 10%.
iv tried lgkdz and kdz update as well as a few other tools. im reasonably pc and android literate but cannot understand why the phone is recognized and the flash starts but never completes.

Try to flash on different pc.

gerrymcgin said:
hi kingrz
i have tried this method as well as a few others. they all fail. the phone is recognized but the flash never completes. even in lg mobile support it fails at 10%.
iv tried lgkdz and kdz update as well as a few other tools. im reasonably pc and android literate but cannot understand why the phone is recognized and the flash starts but never completes.
Click to expand...
Click to collapse
I had this problem yesterdey. Stuck on 10% with lg mobile support.
I've used the link above from part 7 (because My phone was already in SW upgrade mode) and resolved the issue.

iv tried on 4 different computers. it seems to make no difference. it says my phone is on v20_b if that helps at all. i jsut cant get this flasher or any other to complete an install. the sw upgrade screen only activates when battery is in. with battery out vol down then usb all i get is a blank screen. really at my wits end here. thanks for the input so far guys

gerrymcgin said:
iv tried on 4 different computers. it seems to make no difference. it says my phone is on v20_b if that helps at all. i jsut cant get this flasher or any other to complete an install. the sw upgrade screen only activates when battery is in. with battery out vol down then usb all i get is a blank screen. really at my wits end here. thanks for the input so far guys
Click to expand...
Click to collapse
Got the same thing also made a thread about it but nobody knows how to fix it and i tried every tool available if i connect it to LG Mobile support tool it says LGE455 while it is a P880 and no it's not a driver issue.

mine is seen as lgp880 but never gets past either 10% on lmst or smart flash and just sticks at wparam 2010 and i param 210 on kdz. its as if these tools see and recognize the phone then start talikg to it but it never completes. so frustrating

Thanks for nothing all with a whoping140 views

I'll gladly leave lg g4 forum been the most un helpful experience ever between 140 views on both threads ..and even from the most recognized devs with nothing but simplistic answers and guides that ive read already yet the needed answers are known ..... must be considered extra work to explain and help out with my indepth matter .The minute you run across a forum with someone who had this issue almost exactly they say oh edit...fixed now .
But the most stupidest of questions can get answered on here .
Had to waist money on a nexus 5x all cause no one can explain how this great Lg up tool works but apparently it is a botched process if your device shows as Unknown model with no fix no in depth explanation Lg bridge does not work for a true soft brick it only meant to upgrade a device that actually as a bootable O.S
So where does that leave me
Sent from my Nexus 5X using XDA Free mobile app

Did you post your issue in the official LG UP thread or in the back to stock marshmallow kdz thread where the file that you need to get this back to stock using LG Up is listed. If you would have searched in the kdz back to stock thread you would have seen that another user helped me with the exact same issue ss you. Was ready to turn my phone in for warranty before finding my answer there. Your phone is still able to boot into recovery manually but you have to do it a few times then you install a rom that's saved on your sd card and your phone will boot up. Hopefully you still have your G4 and can try this method.
Sent from my LG-H811 using Tapatalk

srod562 said:
Did you post your issue in the official LG UP thread or in the back to stock marshmallow kdz thread where the file that you need to get this back to stock using LG Up is listed. If you would have searched in the kdz back to stock thread you would have seen that another user helped me with the exact same issue ss you. Was ready to turn my phone in for warranty before finding my answer there. Your phone is still able to boot into recovery manually but you have to do it a few times then you install a rom that's saved on your sd card and your phone will boot up. Hopefully you still have your G4 and can try this method.
Sent from my LG-H811 using Tapatalk
Click to expand...
Click to collapse
Really I'm thinking not explain to me how my lg g4 phone can boot into recovery manually when i relocked the boot loader through adb.
All I have is down load mode No regular O.s boot no fast boot mode
Its all secure boot error 1003
I download the kdz 20i from auto primes code fire link that's the only kdz for 20i around .
The issue is lg up tool sees my device as Unknown model because I was on a ROM when this happened apparently there's no fix unless you can boot into the O.s and edit the ROM
Sent from my Nexus 5X using XDA Free mobile app

srod562 said:
Did you post your issue in the official LG UP thread or in the back to stock marshmallow kdz thread where the file that you need to get this back to stock using LG Up is listed. If you would have searched in the kdz back to stock thread you would have seen that another user helped me with the exact same issue ss you. Was ready to turn my phone in for warranty before finding my answer there. Your phone is still able to boot into recovery manually but you have to do it a few times then you install a rom that's saved on your sd card and your phone will boot up. Hopefully you still have your G4 and can try this method.
Sent from my LG-H811 using Tapatalk
Click to expand...
Click to collapse
What do you mean a few times power and volume down and release power and press it again then choose wipe with YES
Yea I tried all that its secure boot error because my boot loader is re-Locked while I was rooted and with twrp
Sent from my Nexus 5X using XDA Free mobile app

I'm wanting to believe that I need to just forget I have the g4 and break it in 3 half's and toss it
So the headache goes away
Sent from my Nexus 5X using XDA Free mobile app

androidddaaron said:
I'll gladly leave lg g4 forum been the most un helpful experience ever between 140 views on both threads ..and even from the most recognized devs with nothing but simplistic answers and guides that ive read already yet the needed answers are known ..... must be considered extra work to explain and help out with my indepth matter .The minute you run across a forum with someone who had this issue almost exactly they say oh edit...fixed now .
But the most stupidest of questions can get answered on here .
Had to waist money on a nexus 5x all cause no one can explain how this great Lg up tool works but apparently it is a botched process if your device shows as Unknown model with no fix no in depth explanation Lg bridge does not work for a true soft brick it only meant to upgrade a device that actually as a bootable O.S
So where does that leave me
Sent from my Nexus 5X using XDA Free mobile app
Click to expand...
Click to collapse
I actually posted my solution in the 20I thread relatively early. I am sorry no one helped you sooner.
If you used an iternational Rom and have an unrecognized model LGBridge is able to update your phone through update error recovery.

Vseprz said:
I actually posted my solution in the 20I thread relatively early. I am sorry no one helped you sooner.
If you used an iternational Rom and have an unrecognized model LGBridge is able to update your phone through update error recovery.
Click to expand...
Click to collapse
0fx
This is impossible lg bridge is not a semi brick or full brick fix tool its a upgrade tool from what I see
lts for a device that's in a bootable operating state allowing firmware upgrade .
It can only read in a device in mtp mode If you only have download mode that doesn't help at all Withp lg bridge The unknown device model issue is only seen with the Other tool Caller Lg up.
I go on and on and on and noone takes my exact scenario and breaks it down .
Sent from my Nexus 5X using XDA Free mobile app

androidddaaron said:
0fx
This is impossible lg bridge is not a semi brick or full brick fix tool its a upgrade tool from what I see
lts for a device that's in a bootable operating state allowing firmware upgrade .
It can only read in a device in mtp mode If you only have download mode that doesn't help at all Withp lg bridge The unknown device model issue is only seen with the Other tool Caller Lg up.
I go on and on and on and noone takes my exact scenario and breaks it down .
Sent from my Nexus 5X using XDA Free mobile app
Click to expand...
Click to collapse
Did you even try it? My phone was in the 1003 boot error with unknown model in LGUp. I only had download mode. Give it a shot before you dismiss it.

Vseprz said:
Did you even try it? My phone was in the 1003 boot error with unknown model in LGUp. I only had download mode. Give it a shot before you dismiss it.
Click to expand...
Click to collapse
I did once I couldn't get bridge to connect with update recovery error
Then difference here is was you boot loader relocked or still unlocked mine is re locked in this state
Sent from my Nexus 5X using XDA Free mobile app

androidddaaron said:
I did once I couldn't get bridge to connect with update recovery error
Then difference here is was you boot loader relocked or still unlocked mine is re locked in this state
Sent from my Nexus 5X using XDA Free mobile app
Click to expand...
Click to collapse
Actually my bootloader was locked at the point I used LGBridge.
Not being able to connect suggests driver problems. Reload them and try again.

Vseprz said:
Actually my bootloader was locked at the point I used LGBridge.
Not being able to connect suggests driver problems. Reload them and try again.
Click to expand...
Click to collapse
So you had twrp plus rooted and relocked boot loader all before attempting lg bridge that's my exact scenario but what about bridge trying to install then Lg bridge AIR Drivers
Sent from my Nexus 5X using XDA Free mobile app

Vseprz said:
Actually my bootloader was locked at the point I used LGBridge.
Not being able to connect suggests driver problems. Reload them and try again.
Click to expand...
Click to collapse
No that's not true I guarantee you wasn't
Relocked boot loader u couldn't have been
I am for sure about this and lg bridge sees my device when I choose update recovery error it tells me there are No update errors that can be recovered
So how does that prove it fixed yours when we was in the same scenario?
Sent from my Nexus 5X using XDA Free mobile app

androidddaaron said:
No that's not true I guarantee you wasn't
Relocked boot loader u couldn't have been
I am for sure about this and lg bridge sees my device when I choose update recovery error it tells me there are No update errors that can be recovered
So how does that prove it fixed yours when we was in the same scenario?
Sent from my Nexus 5X using XDA Free mobile app
Click to expand...
Click to collapse
I made a mistake when upgrading my phone from LP to MM and accidentally left my Bootloader locked when trying to upgrade, nearly bricking my phone. I was receiving a 1003 error every time I tried to boot. I posted this in a different thread last month for someone else who had the same problem.
I had this exact same issue when upgrading my phone. Didn't do it correctly and it took me about 3 hours before I got my phone working again. It was about a week ago on another computer, but I'll try to recall what I did when it finally clicked in my mind.
Download H81120i_00_0201.kdz flashable zip from here (1.6GB Feb-04-16):
http://downloads.codefi.re/autoprime.../H811/H81120i/
Download LGUP and install it. I used the DropBox link in this thread:
http://forum.xda-developers.com/g4/h...mm-lp-t3249803
Remember to install the LGUP_8994_DLL file BEFORE LGUP_Install
Download and install LG Bridge (for the USB drivers) here:
http://www.lg.com/uk/support/pc-suite
Select the LG 815 model, the drivers will work. I only used the LG Bridge to install the USB drivers. Nothing else.
OK, now here's where your phone comes in.
Step 1: Turn off your phone (pull the battery if you must, but put it back in).
Step 2: Hold the VOLUME UP button and plug the USB cable into your PC. This puts your phone into DOWNLOAD MODE.
Step 3: On your PC, open up LGUP. The program shoud recognize the phone as H811 in COM3 or COM4. Highlight it and click the SELECT button.
Step 4: Under the "Process" row, select UPGRADE
Step 5: Click the blank space under File Path, it will pop up a [...] [X] at the end. Click the [...].
Step 6: Select the H81120i_00_0201.kdz and click on Start. The program will push the STOCK H811 MM ROM to your phone. This will bring your phone out of Brick mode, but you will have to go through the entire rooting process again.
Click to expand...
Click to collapse

Donut42 said:
I made a mistake when upgrading my phone from LP to MM and accidentally left my Bootloader locked when trying to upgrade, nearly bricking my phone. I was receiving a 1003 error every time I tried to boot. I posted this in a different thread last month for someone else who had the same problem.
Click to expand...
Click to collapse
Once again I was on a ROM when in did all this if it wasn't for that fact Lg Up would see my device model as h11 not unknown
So tell me how to get past the Unknown device model issue due to bring on a Custom Rom when this happened
Sent from my Nexus 5X using XDA Free mobile app

Donut42 said:
I made a mistake when upgrading my phone from LP to MM and accidentally left my Bootloader locked when trying to upgrade, nearly bricking my phone. I was receiving a 1003 error every time I tried to boot. I posted this in a different thread last month for someone else who had the same problem.
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The issue lies in step 3
The phone doesn't recognize as h811 it is as unknown model
If you know a way around that I'd love to know because every day I Go to snap the phone in half and recycle it as trash I stop my self thinking maybe one person will get that I was on a ROM when this happened and have a solution for Lg up to see my device as h811
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androidddaaron said:
The issue lies in step 3
The phone doesn't recognize as h811 it is as unknown model
If you know a way around that I'd love to know because every day I Go to snap the phone in half and recycle it as trash I stop my self thinking maybe one person will get that I was on a ROM when this happened and have a solution for Lg up to see my device as h811
Sent from my Nexus 5X using XDA Free mobile app
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Click to collapse
That sounds like a driver issue. When I did mine I was also on a custom ROM. I had to manually remove all LG drivers via the Device Manager and install the LG Bridge for its LG USB drivers before the LGUP tool would recognize it. Before I did that it wouldn't even see my phone.

Donut42 said:
That sounds like a driver issue. When I did mine I was also on a custom ROM. I had to manually remove all LG drivers via the Device Manager and install the LG Bridge for its LG USB drivers before the LGUP tool would recognize it. Before I did that it wouldn't even see my phone.
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I would like to think that butt LG up is evidently seeing a connection from my phone to the PC it's just reading the device model as unknown because if I unplug the phone it goes back to reading nothing I plug it back in pops up red box model unknown I know it's reading the phone in LG up because it actually tells you the ROM it detects which is Xtreme ROM by micro mod
Not only that LG Mobile support tool read my phone and says software is up-to-date LG flash tool 2014 attempts to flash but fails because it is not compatible apparently with Android 6.0
Nlg bridge when I try to use that tool sees my phone when I choose update recovery error and says there are no recoveries to update I don't believe it's a driver issue I think it's the fact that I'm stuck on a ROM that is edited in some fashion that will not allow the tool to to proceed to the next step and if you look at the LG up thread it talks about a member explaining about the unknown device model issue is due to the ROM developer editing his ROM name somehow
Everyone that has gotten past the unknown device model happen to have an unlocked bootloader or was just trying to do a regular upgrade and still had an OS to boot into there's just no way around this mess
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Guess this thread has run its course
Closed at OP's request