H872e Downgrade? - T-Mobile LG G6 Questions & Answers

Hey I updated to 20e and I realized that I cant root the g6 unless I have the 20a variant. Can I just download the 20a kdz and flash it? Did anyone try this yet? And is it safe to do this?

if it still ARB1 all good to go totally safe.
to check arb dial *#546368#*872#
enter SVC menu >> Version info >>
check anti roll-back version down there

immns said:
if it still ARB1 all good to go totally safe.
to check arb dial *#546368#*872#
enter SVC menu >> Version info >>
check anti roll-back version down there
Click to expand...
Click to collapse
The Anti-rollback Version is APPSBL(LK): 1, TZ: 1, RPM: 1
I'm guessing I cant then

midnight102 said:
The Anti-rollback Version is APPSBL(LK): 1, TZ: 1, RPM: 1
I'm guessing I cant then
Click to expand...
Click to collapse
Firmware 20a is arb1, same arb means you can downgrade without much issue.

immns said:
Firmware 20a is arb1, same arb means you can downgrade without much issue.
Click to expand...
Click to collapse
what about 11g? Can I downgrade to that instead?

midnight102 said:
what about 11g? Can I downgrade to that instead?
Click to expand...
Click to collapse
11g is ARB0. So the answer is no.
Apparently I've been running off old, incorrect information. 11g is ARB1.

I want to downgrade my device LG H872 T-mobile to nougat, how can i check my anti rollback version to make this downgrade applicable?

midnight102 said:
what about 11g? Can I downgrade to that instead?
Click to expand...
Click to collapse
NighthawkXL said:
11g is ARB0. So the answer is no
Click to expand...
Click to collapse
11g already ARB01, once I've got this phone and got updated to 20a then I realize that only tutorial for rooting is only for 11g and I downgraded to 11g from 20a successfully (factory reset is a must though, backup everything first), later known that those method also work for 20a.
autoprime said:
11g should be ARB 01.....
Click to expand...
Click to collapse
https://forum.xda-developers.com/showpost.php?p=77730436&postcount=43

Kiro.adel said:
I want to downgrade my device LG H872 T-mobile to nougat, how can i check my anti rollback version to make this downgrade applicable?
Click to expand...
Click to collapse
Firmware 11g and 11h are the two Nougat versions you can downgrade to. If you have TWRP there are Stock Zips you can flash.

weakNPCdotCom said:
Firmware 11g and 11h are the two Nougat versions you can downgrade to. If you have TWRP there are Stock Zips you can flash.
Click to expand...
Click to collapse
What is meant by TWRP?
By the way my anti rollback version is : APPSBL(LK): 1, SBL1:1 , TZ:1, RPM:1
And my SW version :H87220f
Can i still downgrade to 11g ?
Thank you so much

Kiro.adel said:
What is meant by TWRP?
By the way my anti rollback version is : APPSBL(LK): 1, SBL1:1 , TZ:1, RPM:1
And my SW version :H87220f
Can i still downgrade to 11g ?
Thank you so much
Click to expand...
Click to collapse
TWRP is custom recovery, if you dont have it use download mode to downgrade

Related

Do I lose OTA if I flash the A1 firmware on my RETBR phone?

And in case of Yes, if I re flash back my original Firmware, will I restore OTA?
(Bootloader LOCKED)
LionLorena said:
And in case of Yes, if I re flash back my original Firmware, will I restore OTA?
(Bootloader LOCKED)
Click to expand...
Click to collapse
Yes for both questions.
abrfilho said:
Yes for both questions.
Click to expand...
Click to collapse
2nd confirmation
And there is no known way to activate OTA back?
LionLorena said:
And there is no known way to activate OTA back?
Click to expand...
Click to collapse
Only retus receive Android One OTA, this is the problem...
You think it's possible to change the channel to RETUS ?
LionLorena said:
You think it's possible to change the channel to RETUS ?
Click to expand...
Click to collapse
It's not possible.

[Firmware][EMUI 9] BLA-L29 C432 9.0.0.161

Official EMUI 9.0 release for Mate 10 Pro (BLA-L29), European version (c432).
Requirements ;
1) Unlocked Bootloader
2) Root (only if you go from EMUI8.0 - > EMUI 9
3) A PC with working ADB
4) Some residual gray matter ?
Download - > https://androidhost.ru/7K8
Installation :
1) Upgrading from EMUI8.0
* use this tool - > https://mega.nz/#!w0kVRJjQ!MxuNRqUWJ-xM-nj2houAGqgreIodqbrwEIfVZ10CDcc
Run flash.bat and follow the on-screen instructions!
2) Updating from EMUI9 beta
* use this tool - > https://mega.nz/#!B9MnBYqQ!Ie7t_5lNSNlfiJqAY6ui_yV9rWyU3UUig2D5MFkdx68
Run flash.bat and follow the on-screen instructions!
Why we need root for 8.0? The download file says no service? Does everthing work? Thanks
inthedark22 said:
Why we need root for 8.0? The download file says no service? Does everthing work? Thanks
Click to expand...
Click to collapse
For the EMUI 8 to 9 tool you will need root. You can do it from TWRP if you wanted to.
But you will need an unlocked bootloader at least, else you won't be able to install it.
No service = its not a service firmware, as most are on androidhost.ru.
Everything works fine. I just flashed it.
inthedark22 said:
Why we need root for 8.0? The download file says no service? Does everthing work? Thanks
Click to expand...
Click to collapse
It says "no service" because it's not a DLOAD firmware.
Sorry, i'm just asking... From where did you got the rom? I see nothing on FF
Pretoriano80 said:
It says "no service" because it's not a DLOAD firmware.
Click to expand...
Click to collapse
Will There be any problem when updating from emui 8.0 to 9.0 if i have deleted some apps from my system folder beforehand ??
ante0 said:
For the EMUI 8 to 9 tool you will need root. You can do it from TWRP if you wanted to.
But you will need an unlocked bootloader at least, else you won't be able to install it.
No service = its not a service firmware, as most are on androidhost.ru.
Everything works fine. I just flashed it.
Click to expand...
Click to collapse
My bootloader is unlocked but everything is stock. Reboot in bootloader and run flash. Bat wont do the trick?
Sheldd said:
Sorry, i'm just asking... From where did you got the rom? I see nothing on FF
Click to expand...
Click to collapse
Got it from a friend, who got it from another friend which found it on www.
inthedark22 said:
My bootloader is unlocked but everything is stock. Reboot in bootloader and run flash. Bat wont do the trick?
Click to expand...
Click to collapse
It won't with the EMUI8 tool as it is now.
I will edit the EMUI9 tool and upload it, it will only require unlocked bootloader.
Edit: You can just use the EMUI9 tool as is, it's using Oreo TWRP and Oreo NoCheck.
As I am sure that EMUI 9 comes with new bootloader, is it possible to flash it without flashing xloader? As the Custom treble rom I want to use do not work on 9.0 vendor, so I could downgrade back.
Or uses the EMUI9 the 02xloader? If 02 then I can upgrade it to try it out!
Hopefully the update doesnt come x years laters for the ones on the official beta lol, anyway have fun guys
L09 nothing yet
how can i root BLA29 c432 157 versiot firmware?
nagyviktor199017 said:
how can i root BLA29 c432 157 versiot firmware?
Click to expand...
Click to collapse
Unlock phone, flash twrp by pretoriano80, flash Magisk zip in twrp.
Alternatively: unlock phone, patch ramdisk in Magisk Manager, flash patched ramdisk in fastboot.
Would this method work for upgrading BLA-L29c636 b145 to BLA-L29C636E2R1P13B159 (9.0.0.159)
Is there any chance of getting a working TWRP/root on this version?
Great news. I've just installed it without problems. Is there any safe way to unroot and relock bootloader?
thatJasper said:
Is there any chance of getting a working TWRP/root on this version?
Click to expand...
Click to collapse
Apparently the root developers, amongst others John Wu (Magisk), are working to get a simple way to root EMUI 9.0.
The root has already been confirmed to be working on the Huawei Mate 10 Pro and more devices should join the party sooner or later.
Click to expand...
Click to collapse
https://www.theandroidsoul.com/emui-9-0-already-rooted/
the rom is working, but horrible performance. 125 000 points with antutu. fully working but very slow. i back to stock emui 8
Pretoriano80 said:
It says "no service" because it's not a DLOAD firmware.
Click to expand...
Click to collapse
I'm on emui 9 beta and my bootloader and FRP were both unlocked. I removed all the scheme (fingerprint ecc.) ... but when i tred to flash the upgrade with your tool I saw that the FRP got locked. In the Setting options, Developper, (OEM unlock option is not anymore active). How can I restore this options to go on with the upgrade? Thank in advance.

PSA: Do not downgrade from Pie (C432B197) using Oreo Rollback (C432B150)

I can only speak for BLA-L29C432B197 (Probably B179 too), but I assume this will cover any Pie firmware released in January.
In these releases Huawei disabled custom kernel, so phone won't boot with a custom kernel flashed.
This had me wanting to downgrade to B161 where it does work. So I try with NoCheck, which is fine to update with, Software install failed.
I try with FH (I happened to have a credit left) HiSuite method, Software install failed.
I tried with Dload package, same result.
So I figure I can use Rollback, as it worked fine on Beta to get back to Oreo with it...
It failed after 7% (or so, I didn't actually watch), device reboot to a black screen. Fastboot was working though.
So it most likely only flashed Oreo bootloader, and device was hardbricked. I managed to get it back using test point and IDT, this will void your warranty though.
So, do not downgrade using NoCheck recovery and rollback package, it's not worth the time to get device back.
Edit: Downgrade from Pie B197 to Oreo B157 is fine using NoCheck.
ante0 said:
So, do not downgrade using NoCheck recovery and rollback package, it's not worth the time to get device back.
Click to expand...
Click to collapse
So, there are no options to downgrade from 197? WTF is wrong with Huawei?
ante0 said:
So, do not downgrade using NoCheck recovery and rollback package, it's not worth the time to get device back.
Click to expand...
Click to collapse
And probably will also require spending money on other tools. Backups are also important, so people with rooted devices should use Partitions Backup (by wanam) and backup nvme, oeminfo and modem partitions.
As for downgrading with DLOAD or HiSuite we have no idea if it will work or if it will brick. Original recovery/eRecovery might have a fail safe mechanism.
badmania98 said:
So, there are no options to downgrade from 197? WTF is wrong with Huawei?
Click to expand...
Click to collapse
Dload might work or just refuse to downgrade, but i don't think it will brick.
Pretoriano80 said:
Partitions Backup (by wanam) and backup nvme, oeminfo and modem partitions.
Click to expand...
Click to collapse
Where I can find this app, and what version I have to use?
I installed Partitions Backup & Restore 2.0.1.
LE. Backup Done.
also.it's happened in alp-al00(mate10 china).
Sent from my HUAWEI ALP-AL00 using XDA Labs
”5. This system version can be rolled back to the official version of EMUI 8.0 in Phone Manager. Rolling back the system version will erase your personal data. For more information, please contact the customer service hotline.” - according to description of v.197 firmware.
Where is this option in the phone menu? It is written in v.179 firmware, also.
badmania98 said:
”5. This system version can be rolled back to the official version of EMUI 8.0 in Phone Manager. Rolling back the system version will erase your personal data. For more information, please contact the customer service hotline.” - according to description of v.197 firmware.
Where is this option in the phone menu? It is written in v.179 firmware, also.
Click to expand...
Click to collapse
There's none! I don't know what they mean with Phone Manager. My guess is that HiSuite = Phone Manager.
zt379 said:
also.it's happened in alp-al00(mate10 china).
Click to expand...
Click to collapse
When downgrading with No_check recovery?
I asked Huawei centre about downgrade and they told me that is possible in service centre only.
ante0 said:
I can only speak for BLA-L29C432B197 (Probably B179 too), but I assume this will cover any Pie firmware released in January.
In these releases Huawei disabled custom kernel, so phone won't boot with a custom kernel flashed.
This had me wanting to downgrade to B161 where it does work. So I try with NoCheck, which is fine to update with, Software install failed.
I try with FH (I happened to have a credit left) HiSuite method, Software install failed.
I tried with Dload package, same result.
So I figure I can use Rollback, as it worked fine on Beta to get back to Oreo with it...
It failed after 7% (or so, I didn't actually watch), device reboot to a black screen. Fastboot was working though.
So it most likely only flashed Oreo bootloader, and device was hardbricked. I managed to get it back using test point and IDT, this will void your warranty though.
So, do not downgrade using NoCheck recovery and rollback package, it's not worth the time to get device back.
Click to expand...
Click to collapse
Hey there, search on forum a tool for P20 Pro. From 179 i came back on 158 Oreo
Pretoriano80 said:
There's none! I don't know what they mean with Phone Manager. My guess is that HiSuite = Phone Manager.
When downgrading with No_check recovery?
Click to expand...
Click to collapse
perhaps never! and now hope xda developers could handle this bad things
Sent from my HUAWEI ALP-AL00 using XDA Labs
lorenzomeini56 said:
Hey there, search on forum a tool for P20 Pro. From 179 i came back on 158 Oreo
Click to expand...
Click to collapse
Can you put a link to this tool.?
badmania98 said:
Can you put a link to this tool.?
Click to expand...
Click to collapse
https://forum.xda-developers.com/huawei-p20/how-to/guide-how-to-rollback-emui-9-beta-to-t3841687
lorenzomeini56 said:
Hey there, search on forum a tool for P20 Pro. From 179 i came back on 158 Oreo
Click to expand...
Click to collapse
does it works in other kirin970 devices of emui9 to emui8??
Sent from my HUAWEI ALP-AL00 using XDA Labs
lorenzomeini56 said:
https://forum.xda-developers.com/huawei-p20/how-to/guide-how-to-rollback-emui-9-beta-to-t3841687
Click to expand...
Click to collapse
This tool we already have it. I dont know if ante0 used it this time, but I think he did ( contains nocheck.img).
badmania98 said:
This tool we already have it. I dont know if ante0 used it this time, but I think he did ( contains nocheck.img).
Click to expand...
Click to collapse
Yep. Same NoCheck.img.
Edit: well, unless that nocheck is for p20... That might be why.
I will compare them.
I can confirm that in connecting my ALP-29 to my Windows 10 PC with HiSuite, I get offered the choice to roll back to Oreo. But the small print warns that your device should not be rooted or unlocked. I'm happy with Pie, so I'm not tempted to check whether this works without bricking your device, but just letting folks know about the purported option. Presumably if you try, you should at minimum unroot first......You also will be factory wiped.
ante0 said:
to get back to Oreo .
Click to expand...
Click to collapse
To what version of Oreo did you tried to get back?
badmania98 said:
To what version of Oreo did you tried to get back?
Click to expand...
Click to collapse
B150, the rollback version. I figured that would work as it is a rollback. But I should maybe have gone with B158.
Either way, don't do it with NoCheck for BLA
I'm almost done repairing device!
ante0 said:
B150, the rollback version. I figured that would work as it is a rollback. But I should maybe have gone with B158.
Click to expand...
Click to collapse
B150 was the roll back from Pie Beta. According to FF, I think that B156 and 157 are the roll back from official Pie.
badmania98 said:
B150 was the roll back from Pie Beta. According to FF, I think that B156 and 157 are the roll back from official Pie.
Click to expand...
Click to collapse
B157 should be the roll-back version. But a P20 Pro owner bricked when downgrading with HiSuite, with a completely stock device, so....

Prepare to EMUI 10

Comming soon.. maybe this year
il3gal said:
Comming soon.. maybe this year
Click to expand...
Click to collapse
That's old, there's already a B140 build. xD
Pretoriano80 said:
That's old, there's already a B140 build. xD
Click to expand...
Click to collapse
FF is always behind a bit I think, but if it's there it means its coming soon.
Pretoriano80 said:
That's old, there's already a B140 build. xD
Click to expand...
Click to collapse
Looking forward for an update solution from you and ante0.
badmania98 said:
Looking forward for an update solution from you and ante0.
Click to expand...
Click to collapse
All versions of EMUI10 that I've tested so far, force locks bootloader. So don't install if you don't want to get locked. I guess if you have beta access approved you can downgrade back to 9.1 using HiSuite.
I have to downgrade using testpoint
Fastboot will still say you're unlocked but the command fastboot oem lock-state info says it's locked. Downgrading back to 9.1 will give back the unlock status, apparently. I guess they just add something to lock even if you're technically still unlocked. And the command to unlock through fastboot is removed so no way to unlock it again. I hope it's just locking for the beta.
ante0 said:
All versions of EMUI10 that I've tested so far, force locks bootloader. So don't install if you don't want to get locked. I guess if you have beta access approved you can downgrade back to 9.1 using HiSuite.
I have to downgrade using testpoint
Fastboot will still say you're unlocked but the command fastboot oem lock-state info says it's locked. Downgrading back to 9.1 will give back the unlock status, apparently. I guess they just add something to lock even if you're technically still unlocked. And the command to unlock through fastboot is removed so no way to unlock it again. I hope it's just locking for the beta.
Click to expand...
Click to collapse
Maybe it is necessary to downgrade till EMUI 8.0?
I don't have beta access till now. But , as you know, I follow your and Pretoriano80 work very carefully.
badmania98 said:
Looking forward for an update solution from you and ante0.
Click to expand...
Click to collapse
Like @ante0 said in the previous post, we already have the links for the updates, but so far all of them will trigger the bootloader lock, so unless you don't care about it, you should refrain from flashing EMUI10.
If the final release won't change this behavior, then probably Huawei has decided to lock the bootloader for good.
Pretoriano80 said:
Like @ante0 said in the previous post, we already have the links for the updates, but so far all of them will trigger the bootloader lock, so unless you don't care about it, you should refrain from flashing EMUI10.
If the final release won't change this behavior, then probably Huawei has decided to lock the bootloader for good.
Click to expand...
Click to collapse
I prefer to wait. If you 2 will find a good solution to maintain boot-loader unlocked, I will follow it.
badmania98 said:
Maybe it is necessary to downgrade till EMUI 8.0?
I don't have beta access till now. But , as you know, I follow your and Pretoriano80 work very carefully.
Click to expand...
Click to collapse
Downgrade to EMUI 8?
Well, if you do like me you have to as I have to flash board when BL is locked.
If you mean to keep unlock it won't work. Update from Oreo to Q directly will cause problems, it did for me when going Oreo to 9.1 anyway, and system update actually forces you to flash the latest stable 9.0 (9.0.0.197) to update to 9.1.0.300 then to 9.1.0.306.
And it's not like it's using a function to lock BL like they do when you flash a dload firmware. It's probably still unlocked but something changes it to locked. Iirc you could unlock using TP before, but now it refuses as USERLOCK is changed to unlock as well when you use testpoint, so it will just say "Phone is already unlocked", before it only changed FBLOCK to unlock.
But we will see what happens
@ante0 @Pretoriano80 : just in case I would install this beta from FF. What install method I have to use?
badmania98 said:
@[email protected] : just in case I would install this beta from FF. What install method I have to use?
Click to expand...
Click to collapse
Installing with no-check recovery should work just fine, but you should also flash the new CUST and Preload.
If you really want to flash it, i can send you the link with the latest build (B140), but like i said, it will lock your bootloader.
Pretoriano80 said:
Installing with no-check recovery should work just fine, but you should also flash the new CUST and Preload.
If you really want to flash it, i can send you the link with the latest build (B140), but like i said, it will lock your bootloader.
Click to expand...
Click to collapse
Yes, thanks in advance. Also the link for the no-check recovery & tool.
LE. It is from somebody else.
badmania98 said:
Yes, thanks in advance. Also the link for the no-check recovery & tool.
LE. It is from somebody else.
Click to expand...
Click to collapse
It's a BLA-L29 C432 device?
Pretoriano80 said:
It's a BLA-L29 C432 device?
Click to expand...
Click to collapse
Yes.
badmania98 said:
Yes.
Click to expand...
Click to collapse
You can use the 3 files tool (skip the rooting part, of course) from here -> https://forum.xda-developers.com/mate-10/how-to/tool-emui-9-0-to-9-1-upgrade-tool-t3949867 <- and replace the nocheck.img with the one from here (tge no verification version) - > https://forum.xda-developers.com/mate-10/development/recovery-nocheck-pie-t3950037
Make sure that the downloaded firmwares are not corrupt, otherwise the installation may fail, because the no-check recovery will skip the integrity check.
I will send you the update files in PM.
i'd like to have a link for the update files aswell please, on firmware finder PC version there's only 10.0.139
vandal4e said:
i'd like to have a link for the update files aswell please, on firmware finder PC version there's only 10.0.139
Click to expand...
Click to collapse
It doesn't really matter. When you flash it you won't be able to flash any newer ones as you won't be unlocked anymore, and can't unlock again either without downgrading back to 9.1.
I would wait until official to see if forced locking remains or not.

Can I downgrade from March 2019 pie to last oreo android firmware and if so how? (T m

I coasted by for months not upgrading my note 8 because I heard bad things about pie on note 8. Well this morning I accidentally hit install now instead of backing out of it. Can I downgrade back to the final last version of oreo stock firmware? Here's my software info.
Can I and if so how to downgrade to tmobile note 8 oreo? https://imgur.com/gallery/puzXavA
Thank you very much.
Tmansdc said:
Can I downgrade back to the final last version of oreo stock firmware?
Click to expand...
Click to collapse
I don't have the "how to" answer for you. However, since you aren't on AT&T's locked bootloader, you can downgrade to any stock ROM you like. In either case, backing up your data, is a must.
Anonymously_Unknown said:
I don't have the "how to" answer for you. However, since you aren't on AT&T's locked bootloader, you can downgrade to any stock ROM you like. In either case, backing up your data, is a must.
Click to expand...
Click to collapse
What is wrong with my phone/odin? What am I doing wrong?
https://imgur.com/a/Krs3cgS
Tmansdc said:
What is wrong with my phone/odin? What am I doing wrong?
https://imgur.com/a/Krs3cgS
Click to expand...
Click to collapse
You can only downgrade if you use the same bootloader version you're on bootloader version 5 so you cannot try to flash any bootloader version below 5 it must be 5 or above! @Anonymously_Unknown is incorrect when he stated your bootloader isn't locked because your bootloader is locked unless you have the F version which you don't have. You have the American version not the international F version. Also you need to use the newest version of Odin available.
Thanks for the clarification

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