• Introducing XDA Computing: Discussion zones for Hardware, Software, and more!    Check it out!

Downgrade from 7.0 to 6.0.1 for the LG G5 H850

Search This thread

xjqlfq

Member
Aug 27, 2009
28
16
GuangZhou,China
1,unlocked bootload,https://www.gizdev.com/lg-g5-h850-twrp-3-0-rooting-guide/
2,install rec for h850 ,http://thunderztech.com/root-lg-g5-on-android-7-0-nougat-with-twrp-recovery/
3,into rec and flash LG-H85010E-Flashable.Bootloader.zip from autoprime,http://forum.xda-developers.com/lg-g5/development/stock-h850-10e-eu-rom-flashable-zips-t3448273
4,lg up flash 6.0.1 kdz,http://forum.xda-developers.com/lg-g5/development/stock-h850-10e-eu-rom-flashable-zips-t3448273
5,wipe you device by keep volume- always and power,when look lg logo,press power again and keep it ,then press yes,yes
you have downgrade to 6.0.1
 
Last edited:

autoprime

Recognized Dev / Inactive Recognized Contributor
Jun 23, 2010
2,640
11,902
1,unlocked bootload,https://www.gizdev.com/lg-g5-h850-twrp-3-0-rooting-guide/
2,install rec for h850 ,http://thunderztech.com/root-lg-g5-on-android-7-0-nougat-with-twrp-recovery/
3,into rec and flash LG-H85010E-Flashable.COMPLETE.zip from autoprime,http://forum.xda-developers.com/lg-g5/development/stock-h850-10e-eu-rom-flashable-zips-t3448273
4,lg up flash 6.0.1 kdz,http://forum.xda-developers.com/lg-g5/development/stock-h850-10e-eu-rom-flashable-zips-t3448273
5,wipe you device by keep volume- always and power,when look lg logo,press power again and keep it ,then press yes,yes
you have downgrade to 6.0.1

good info.

I can make it even easier... instead of downloading my 10E COMPLETE ZIP
Just download/flash my 10E BOOTLOADER ZIP. It'll make LGUP work again with M KDZs and the BOOTLOADER ZIP is much smaller!
 

fuxi222

Senior Member
Jan 30, 2010
59
11
Chemnitz
good info.

I can make it even easier... instead of downloading my 10E COMPLETE ZIP
Just download/flash my 10E BOOTLOADER ZIP. It'll make LGUP work again with M KDZs and the BOOTLOADER ZIP is much smaller!

I had several problems with this procedure (coming from V20a):
1. After flashing 10C BOOTLOADER ZIP via TWRP, LGUP was not able to detect my device type anymore, but this worked with previous bootloader. Why?
2. Flashing the 10C COMPLETE ZIP did result in a loss of TWRP (although recovery.img is not part if complete ZIP). Why?
3. Flashing the 10E COMPLETE ZIP caused FCs and a bootloop :( Reset in system recovery did help to get the device up again.
After that LGUP did find again my H850 and upgrade option works now with M KDZs (which did not work under Nougat). But the refurbish option is still not working and says "not supported".
 
Last edited:

autoprime

Recognized Dev / Inactive Recognized Contributor
Jun 23, 2010
2,640
11,902
I had several problems with this procedure (coming from V20a):
1. After flashing 10C BOOTLOADER ZIP via TWRP, LGUP was not able to detect my device type anymore, but this worked with previous bootloader. Why?
2. Flashing the 10C COMPLETE ZIP did result in a loss of TWRP (although recovery.img is not part if complete ZIP). Why?
3. Flashing the 10E COMPLETE ZIP caused FCs and a bootloop :( Reset in system recovery did help to get the device up again.
After that LGUP did find again my H850 and upgrade option works now with M KDZs (which did not work under Nougat). But the refurbish option is still not working and says "not supported".

1. I suggested 10E not 10C.. not sure why LGUP 1.14 + UPPERCUT wouldn't see it. But UPPERCUT is geared towards recent devices on recent software. It's possible 10C is too old to fall under the UPPERCUT 1.0.0.0 umbrella.. and you're always welcome to use the older LGUP methods instead.

2. You will always lose TWRP if you boot into Android without patching the boot.img or flashing supersu zip first. The stock system.img has a patch in it which always tries to replace the recovery partition with stock recovery.. and zips like supersu stop such things from happening. The procedure is to flash twrp.. boot into twrp.. flash supersu. flashing twrp then booting into android = no more twrp. this is standard android stuff for awhile now.

3. The refurbish option isn't needed and I've already explained in the UPPERCUT thread that refurbish is not supported. All refurbish option does is force the phone to run a factory reset after KDZ finishes... the user can just run a factory reset manually after the flash to achieve the exact same end result.
 
Last edited:

fuxi222

Senior Member
Jan 30, 2010
59
11
Chemnitz
1. I suggested 10E not 10C.. not sure why LGUP 1.14 + UPPERCUT wouldn't see it. But UPPERCUT is geared towards recent devices on recent software. It's possible 10C is too old to fall under the UPPERCUT 1.0.0.0 umbrella.. and you're always welcome to use the older LGUP methods instead.

2. You will always lose TWRP if you boot into Android without patching the boot.img or flashing supersu zip first. The stock system.img has a patch in it which always tries to replace the recovery partition with stock recovery.. and zips like supersu stop such things from happening. The procedure is to flash twrp.. boot into twrp.. flash supersu. flashing twrp then booting into android = no more twrp. this is standard android stuff for awhile now.

3. The refurbish option isn't needed and I've already explained in the UPPERCUT thread that refurbish is not supported. All refurbish option does is force the phone to run a factory reset after KDZ finishes... the user can just run a factory reset manually after the flash to achieve the exact same end result.

At first: Big thanks for your quick response!!!

to 1.: The reason for 10C instead of 10E is simple: you do not have a KDZ file for 10E on your codefire drive (only a ZIP), but for 10C the KDZ was available. And the links to LG server were not working yesterday for me.
I read Uppercut the first time now and will give it a try today in the evening (German time). :fingers-crossed:

to 2.: Understood. Thank you! :good:

to 3.: Then how can I get rid of the 3 error messages on start-up related to NT-code ("Can't find matched cust for NT-code" + "OP name for Buyer-code...")? I understood, that refurbish will flash new cust partition and this will solve the problem. I see cust.img also on your drive, but it is not inluded in the COMPLETE ZIPs. Would it help to flash this?
Or can LG Bridge help in this case? It does refuse to flash my phone, maybe because of the bootloader unlock?!
I read so many threads yesterday, but nothing solved this issue... :crying::crying:
 
Last edited:

autoprime

Recognized Dev / Inactive Recognized Contributor
Jun 23, 2010
2,640
11,902
to 3.: Then how can I get rid of the 3 error messages on start-up related to NT-code ("Can't find matched cust for NT-code" + "OP name for Buyer-code...")? I understood, that refurbish will flash new cust partition and this will solve the problem. I see cust.img also on your drive, but it is not inluded in the COMPLETE ZIPs. Would it help to flash this?
Or can LG Bridge help in this case? It does refuse to flash my phone, maybe because of the bootloader unlock?!
I read so many threads yesterday, but nothing solved this issue... :crying::crying:

cust should be getting flashed regardless of selecting refurbish or not as far as I know.. but perhaps I'm wrong. :confused:
if you have root/twrp just zero out the cust partition or simply delete the files inside the cust folder using a file explorer app... and the error msg should go away on next reboot.
this is in the FAQ/Q&A section in the OP of all my stock threads for H850.

if you're on M and must flash a KDZ with refurb option... just use the old LGUP methods. but if you're sticking with TWRP there's not really any need to flash any KDZ.. you can flash whatever in TWRP instead.
 

fuxi222

Senior Member
Jan 30, 2010
59
11
Chemnitz
cust should be getting flashed regardless of selecting refurbish or not as far as I know.. but perhaps I'm wrong. :confused:
if you have root/twrp just zero out the cust partition or simply delete the files inside the cust folder using a file explorer app... and the error msg should go away on next reboot.
this is in the FAQ/Q&A section in the OP of all my stock threads for H850.

if you're on M and must flash a KDZ with refurb option... just use the old LGUP methods. but if you're sticking with TWRP there's not really any need to flash any KDZ.. you can flash whatever in TWRP instead.

"and the error msg should go away on next reboot." I get 3 error messages related to this. Will I get rid of all of them?
"old LGUP methods" means tool version 1.11 instead of 1.14? So use version 1.11 for MM and 1.14 for N?!
Unfortunately, refurbish does not work even under MM for me regardless if I use version 1.11 or 1.14. :(
BTW: The old version 1.11 asks my each time I trigger the refurbish process to "Input new NT code" (the new version does not behave like this). Is my problem maybe caused by this or can this be used to input a working string there?
 

autoprime

Recognized Dev / Inactive Recognized Contributor
Jun 23, 2010
2,640
11,902
"and the error msg should go away on next reboot." I get 3 error messages related to this. Will I get rid of all of them?
"old LGUP methods" means tool version 1.11 instead of 1.14? So use version 1.11 for MM and 1.14 for N?!
Unfortunately, refurbish does not work even under MM for me regardless if I use version 1.11 or 1.14. :(
BTW: The old version 1.11 asks my each time I trigger the refurbish process to "Input new NT code" (the new version does not behave like this). Is my problem maybe caused by this or can this be used to input a working string there?

i dont have an H850 so idk.. but any time ive had someone zero cust theyve said errors have gone away. so if they dont for you.. you must be special. try it and find out... then report back. if it doesnt work... ¯\_(ツ)_/¯

old lgup methods = 1.11 + dll msi installer, yes. but i see no reason to use 1.11 simply for refurbish option. most people should be able to use LGUP 1.14 + UPPERCUT for most situations on G4/G5/V20.

i dont know abotu the NT code stuff with LGUP.. again.. I dont have a H850. but if you have TWRP then there's really no need to be messing with LGUP at all unless you want to be 100% stock/unrooted with no TWRP. just zero cust or try flashing the cust.img that's in the folder.

I cant help any more on this NTCode subject without a device that uses it. good luck.
 
Last edited:
  • Like
Reactions: fuxi222

fuxi222

Senior Member
Jan 30, 2010
59
11
Chemnitz
good info.

I can make it even easier... instead of downloading my 10E COMPLETE ZIP
Just download/flash my 10E BOOTLOADER ZIP. It'll make LGUP work again with M KDZs and the BOOTLOADER ZIP is much smaller!
Only if someone is on the same point: For me, it is only working to flash the COMPLETE ZIP! When I flash bootloader only, LGUP does not detect the model type of my device anymore (detected type is "Unknown"). I have tried it now for 2 times with similar results...

BTW: I used this method to get rid of the annoying NT code issue: http://forum.xda-developers.com/showpost.php?p=66957161&postcount=4
 
Last edited:
  • Like
Reactions: KnightRider2008

TH4N1X

Member
Jun 5, 2015
40
2
@autoprime Can't we just flash 10E with the refubrish option? Somehow I'm unable to get into recovery with the button combination after downgrading and updating again, even though I'm doing it properly and I was able to do it before.

EDIT: So refubrish stopped working now too. Dang. I installed the recovery through Dirty Cow, flashed the bootstack and went back to 10E, but I still don't have a recovery. ;_;

Ok, I've tried everything and button combination for recovery still doesn't work, so think if you really wanna risk being unable to easily factory reset your phone.
 
Last edited:

chrcol

Senior Member
Jan 17, 2012
1,057
165
UK
1. I suggested 10E not 10C.. not sure why LGUP 1.14 + UPPERCUT wouldn't see it. But UPPERCUT is geared towards recent devices on recent software. It's possible 10C is too old to fall under the UPPERCUT 1.0.0.0 umbrella.. and you're always welcome to use the older LGUP methods instead.

2. You will always lose TWRP if you boot into Android without patching the boot.img or flashing supersu zip first. The stock system.img has a patch in it which always tries to replace the recovery partition with stock recovery.. and zips like supersu stop such things from happening. The procedure is to flash twrp.. boot into twrp.. flash supersu. flashing twrp then booting into android = no more twrp. this is standard android stuff for awhile now.

3. The refurbish option isn't needed and I've already explained in the UPPERCUT thread that refurbish is not supported. All refurbish option does is force the phone to run a factory reset after KDZ finishes... the user can just run a factory reset manually after the flash to achieve the exact same end result.

Well I am trying to flash stock EE rom, which I have the KDZ for.

I am flashing via upgrade, and all that happens is when the phone boots it is unstable, phone app crashing etc.

All settings still intact, no myee app, app from open EU rom still exists, very very strange.

Is it possible to convert a KDZ to a twrp flashable zip as twrp seems far easier.

I suspect if I used refurbish it would fix this issue as upgrade seems to not be clearing everything.
 

Pphish20

Senior Member
Aug 27, 2015
407
180
Boulder
Well I am trying to flash stock EE rom, which I have the KDZ for.

I am flashing via upgrade, and all that happens is when the phone boots it is unstable, phone app crashing etc.

All settings still intact, no myee app, app from open EU rom still exists, very very strange.

Is it possible to convert a KDZ to a twrp flashable zip as twrp seems far easier.

I suspect if I used refurbish it would fix this issue as upgrade seems to not be clearing everything.
Did u try what I suggested in other thread? Wipe internal storage before first boot, reboot recovery afterwards before booting system; are u clean flashing? Are you trying to restore any data at all besides things like messages and call logs?
Going from an openEU.kdz to a branded .Kdz would definitely require a Twrp data format and a recovery reboot, perhaps do all this b4 using LGUP with kdz.
Yes it is possible to make a .zip from a kdz, but it's not a simple process and there is no EE branded 20a.zip
Autoprime already stated that refurbish option can be used if you use LGUP v1.11 instead of latest 1.14 but don't forget the .DLL file. Also all refurbish does is wipe data and internal storage; which can be done via TWRP using the method I mentioned above. Try what I mentioned and then reflash kdz;forget about any data besides text messages just take the extra 30min to resetup device from scratch.
What version of LGUP are you using? Can u give more info be more descriptive about what's happening?
 

chrcol

Senior Member
Jan 17, 2012
1,057
165
UK
it is resolved now but I was just trying to get it in a good state to return the phone to EE.

Doing a factory reset in twrp didnt work, but what did work is I did a reset from in the rom, and after the reboot it was properly reset.

What was odd is when I wiped system and data manually in twrp that also didnt work.

I think I forgot to check if I completely wiped the internal storage, photos etc. As I was rushing to get the phone to be sent back. But the description for the reset option in android says it does wipe all personal data so hopefully that did it.
 
  • Like
Reactions: Pphish20

friz

Senior Member
Feb 21, 2008
79
31
For H850 just download H85010i_00_OPEN_EU_OP_0923.kdz flash it with LGUP 1.4(uppercut) after it's finished reset the phone then just flash android 6 firmware that you like.
 
Last edited:

sad_but_cool1

Senior Member
Dec 29, 2010
395
62
39
i have h850 ,
current firmware is v20a updated via fota
no root , no bootloader unlock ,,, compleatlly stock phone
i want to downgreade to any 6.0.1 firmware without losing data (if possible)
if not, what to check and what steps to do without tripping on cust ot drk or modem or .... issues ?

pleas advice me ....
 

Binh Vo

Member
Mar 27, 2016
43
3
LGUP corrupts whenever i hit Start, but it works just fine with N kdz (mine is 20a). I have tried to flash bootloader but still ended up with the same outcome.
 

dietoro

Senior Member
Oct 28, 2011
247
61
modena
Lucky patcher does not work on nougat. Application not installed. playstore error 504

good info.

I can make it even easier... instead of downloading my 10E COMPLETE ZIP
Just download/flash my 10E BOOTLOADER ZIP. It'll make LGUP work again with M KDZs and the BOOTLOADER ZIP is much smaller!

I rooted H850 following autoprime's LG G5 H850 Bootloader Unlock instruction with autoprime's modded "Minimal ADB and Fastboot" {[ 1.) selecting port 41 in device manager (maybe was not necessary) and 2.) pushing TWRP twrp-3.1.1-0-h850.img 3.)booted into recovery (Using 2 hands.. use one hand/finger to press/hold volume down.. and use the other hand for the power button. Press n hold both buttons.) 4. flashing SuperSU (UPDATE-SuperSU-v2.82-20170528234214.zip) ]}.

Installed 20a with lgup because for a strange (windows 10 folder administrator permission) reason nether UPPERCUT_1.0.0.0.exe nether LGFlashTool.exe worked properly).

Unfortunatly I installed [ROM] [Nougat 7.0] Fulmics ROM 3.3 ◦ v20D ◦ H850 but, because the very big LACK of xposed framework on nougat, I had too much difficulties to patch correctly the core jar with lucky patcher getting a lot of error "app not installed the package appears to be corrupt" and other play store error 504 app not installed.

So I decided to downgrade and leave from any Nougat 7.0 based rom in order to move on Marshmallow 6.0. In particular I used TWRP to wipe everything and flash [STOCK][M] H850 10E OPEN EU ROM autoprime's 10E COMPLETE ZIP then Supersu then framework.

On android this time I skipped google registration and LG software updates with data and wifi OFF.
Then I activated USB debug in developer section
Then I followed these step in that really precise order:
a) installed super su again with twrp (want to be sure to have got ROOT);
b) configure Super Su setting in android to activate pseudo PRO option then uncheck the "separation mount space" in order to share .init;
c) configure Super Su setting giving permission always without asking and also during in boot (to everybody);
d) installed xposed-v87-sdk23-arm64.zip in TWRP
e) installed lucky patcher and using it to unistall every LG apps;
f) activate for the very first time wify in order to update immidiately lucky patcher (update available in lucky patcher settings) than download patch update;
g) installed xposed apk (in android obviosly because I refer to apk pattern) and run it following app procedure for a correct detection of framework then activate Lucky patcher module in xposed apk then reboot to permit lucky patcher using framework;
h) installed busybox (after the check I choose the "smart install").
i) and now I enjoy the freedom that I haven't got in Nougat to test some application before buying them, just to be sure to not waste money for fake apk like voice pro or other expensive one that fools me before so many times. :good:

Update: G5 H850 Genisys Theme 1.3 v10e MM is a great choice for stability and battery life.
 
Last edited:

Top Liked Posts

  • There are no posts matching your filters.
  • 7
    1,unlocked bootload,https://www.gizdev.com/lg-g5-h850-twrp-3-0-rooting-guide/
    2,install rec for h850 ,http://thunderztech.com/root-lg-g5-on-android-7-0-nougat-with-twrp-recovery/
    3,into rec and flash LG-H85010E-Flashable.Bootloader.zip from autoprime,http://forum.xda-developers.com/lg-g5/development/stock-h850-10e-eu-rom-flashable-zips-t3448273
    4,lg up flash 6.0.1 kdz,http://forum.xda-developers.com/lg-g5/development/stock-h850-10e-eu-rom-flashable-zips-t3448273
    5,wipe you device by keep volume- always and power,when look lg logo,press power again and keep it ,then press yes,yes
    you have downgrade to 6.0.1
    5
    1,unlocked bootload,https://www.gizdev.com/lg-g5-h850-twrp-3-0-rooting-guide/
    2,install rec for h850 ,http://thunderztech.com/root-lg-g5-on-android-7-0-nougat-with-twrp-recovery/
    3,into rec and flash LG-H85010E-Flashable.COMPLETE.zip from autoprime,http://forum.xda-developers.com/lg-g5/development/stock-h850-10e-eu-rom-flashable-zips-t3448273
    4,lg up flash 6.0.1 kdz,http://forum.xda-developers.com/lg-g5/development/stock-h850-10e-eu-rom-flashable-zips-t3448273
    5,wipe you device by keep volume- always and power,when look lg logo,press power again and keep it ,then press yes,yes
    you have downgrade to 6.0.1

    good info.

    I can make it even easier... instead of downloading my 10E COMPLETE ZIP
    Just download/flash my 10E BOOTLOADER ZIP. It'll make LGUP work again with M KDZs and the BOOTLOADER ZIP is much smaller!
    2
    I had several problems with this procedure (coming from V20a):
    1. After flashing 10C BOOTLOADER ZIP via TWRP, LGUP was not able to detect my device type anymore, but this worked with previous bootloader. Why?
    2. Flashing the 10C COMPLETE ZIP did result in a loss of TWRP (although recovery.img is not part if complete ZIP). Why?
    3. Flashing the 10E COMPLETE ZIP caused FCs and a bootloop :( Reset in system recovery did help to get the device up again.
    After that LGUP did find again my H850 and upgrade option works now with M KDZs (which did not work under Nougat). But the refurbish option is still not working and says "not supported".

    1. I suggested 10E not 10C.. not sure why LGUP 1.14 + UPPERCUT wouldn't see it. But UPPERCUT is geared towards recent devices on recent software. It's possible 10C is too old to fall under the UPPERCUT 1.0.0.0 umbrella.. and you're always welcome to use the older LGUP methods instead.

    2. You will always lose TWRP if you boot into Android without patching the boot.img or flashing supersu zip first. The stock system.img has a patch in it which always tries to replace the recovery partition with stock recovery.. and zips like supersu stop such things from happening. The procedure is to flash twrp.. boot into twrp.. flash supersu. flashing twrp then booting into android = no more twrp. this is standard android stuff for awhile now.

    3. The refurbish option isn't needed and I've already explained in the UPPERCUT thread that refurbish is not supported. All refurbish option does is force the phone to run a factory reset after KDZ finishes... the user can just run a factory reset manually after the flash to achieve the exact same end result.
    1
    "and the error msg should go away on next reboot." I get 3 error messages related to this. Will I get rid of all of them?
    "old LGUP methods" means tool version 1.11 instead of 1.14? So use version 1.11 for MM and 1.14 for N?!
    Unfortunately, refurbish does not work even under MM for me regardless if I use version 1.11 or 1.14. :(
    BTW: The old version 1.11 asks my each time I trigger the refurbish process to "Input new NT code" (the new version does not behave like this). Is my problem maybe caused by this or can this be used to input a working string there?

    i dont have an H850 so idk.. but any time ive had someone zero cust theyve said errors have gone away. so if they dont for you.. you must be special. try it and find out... then report back. if it doesnt work... ¯\_(ツ)_/¯

    old lgup methods = 1.11 + dll msi installer, yes. but i see no reason to use 1.11 simply for refurbish option. most people should be able to use LGUP 1.14 + UPPERCUT for most situations on G4/G5/V20.

    i dont know abotu the NT code stuff with LGUP.. again.. I dont have a H850. but if you have TWRP then there's really no need to be messing with LGUP at all unless you want to be 100% stock/unrooted with no TWRP. just zero cust or try flashing the cust.img that's in the folder.

    I cant help any more on this NTCode subject without a device that uses it. good luck.
    1
    good info.

    I can make it even easier... instead of downloading my 10E COMPLETE ZIP
    Just download/flash my 10E BOOTLOADER ZIP. It'll make LGUP work again with M KDZs and the BOOTLOADER ZIP is much smaller!
    Only if someone is on the same point: For me, it is only working to flash the COMPLETE ZIP! When I flash bootloader only, LGUP does not detect the model type of my device anymore (detected type is "Unknown"). I have tried it now for 2 times with similar results...

    BTW: I used this method to get rid of the annoying NT code issue: http://forum.xda-developers.com/showpost.php?p=66957161&postcount=4