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Regain root after Marhmallow update?

I had Android 5.0 (PB1) and was rooted. I updated to Marshmallow using the posted method, and everything went well, but I did lose root access after updating to Marshmallow, which I did expect. I did downgrade to 5.0 (PB1) and tried to root using the posted directions, but to no avail. I am now attempting to update back to marshmallow. I also have a LOCKED bootloader.

Goto rooting the S5 thread as locked 6.0.1 is rooted for days now.
Killing Them Loudly

Molon-Labe said:
Goto rooting the S5 thread as locked 6.0.1 is rooted for days now.
Killing Them Loudly
Click to expand...
Click to collapse
So I still can root with 6.01 with a locked bootloder?

No, you cannot. This is discussed in numerous threads. Such as Muniz_ri's root thread and the unlock bootlooder thread. Please search before posting a thread which this has been mentioned. Thank you

Got to downgrade then root etc..
Killing Them Loudly

Molon-Labe said:
Yes look after method 4
http://forum.xda-developers.com/showthread.php?t=3337909
Killing Them Loudly
Click to expand...
Click to collapse
I read that article, but you need to be rooted do that, I tried to downgrade to 5.0 (PB1) and tried to root according to the directions from the link that is also referenced to on that page, but it did not work. Is there a specific way to downgrade to 5.0 (PB1) and to root? What iI did was I used Odin and flashed the PB1 image and then tried the rooting method mentioned, but it did not work. If there is a specific way to downgrade to PB1 and root, then I can follow the directions that you suggested to me.

Uptime73 said:
I read that article, but you need to be rooted do that, I tried to downgrade to 5.0 (PB1) and tried to root according to the directions from the link that is also referenced to on that page, but it did not work. Is there a specific way to downgrade to 5.0 (PB1) and to root? What iI did was I used Odin and flashed the PB1 image and then tried the rooting method mentioned, but it did not work. If there is a specific way to downgrade to PB1 and root, then I can follow the directions that you suggested to me.
Click to expand...
Click to collapse
i did this a bunch of times with my S5 with a locked bootloader (i have a Toshiba 11 emmc) --
flash stock PB1 and follow the Get Root instructions on PB1, http://forum.xda-developers.com/verizon-galaxy-s5/general/root-method-og5-ok3-t3290370
then follow upgrade instructions for locked bootloader to PD1. try this thread: http://forum.xda-developers.com/ver...ow-to-flash-custom-6-0-1-roms-locked-t3393943 (this worked for me)
( there is also this one, but it didnt work for me: http://forum.xda-developers.com/ver...w-to-update-to-g900voe1-5-0-keeproot-t3149784 )
All the info is here in the forums. good luck!

stras1234 said:
i did this a bunch of times with my S5 with a locked bootloader (i have a Toshiba 11 emmc) --
flash stock PB1 and follow the Get Root instructions on PB1, http://forum.xda-developers.com/verizon-galaxy-s5/general/root-method-og5-ok3-t3290370
then follow upgrade instructions for locked bootloader to PD1. try this thread: http://forum.xda-developers.com/ver...ow-to-flash-custom-6-0-1-roms-locked-t3393943 (this worked for me)
( there is also this one, but it didnt work for me: http://forum.xda-developers.com/ver...w-to-update-to-g900voe1-5-0-keeproot-t3149784 )
All the info is here in the forums. good luck!
Click to expand...
Click to collapse
I was initially on PB1 with root access, and looking back, I should have followed the link of how to unlock the boot loader and to update to PD1. Unfortunately, I followed the directions on the last link you gave me, the one you said that didn't work for you.....the one about updating to PD1 for locked boot loaders. Unlike you, it worked for me. I was on PD1 without a problem, but I wasn't rooted.. So I tried to downgrade back to PB1 and then follow the rooting directions, but it didn't work for me.
From what I have been told, since I upgraded to 6.0 (PD1), it is IMPOSSIBLE to downgrade to 5.0 and root. Is this correct?
Also, if that is the case, then is it possible for me to apply a pre rooted 5.0 image, so I can unlock the blootloader and update to 6.0?
Thanks in advance.

THERE IS NO ROOT FOR PD1 (MashMellow) for LOCKED BOOTLOADER yet. Once you're on MM 6.0 you will lose root. If you want root, you need to downgrade back to PB1 (LP), then get root working again. Once up upgrade from PB1 LP to 6.0 MM you will lose root.

buhohitr said:
THERE IS NO ROOT FOR PD1 (MashMellow) for LOCKED BOOTLOADER yet. Once you're on MM 6.0 you will lose root. If you want root, you need to downgrade back to PB1 (LP), then get root working again. Once up upgrade from PB1 LP to 6.0 MM you will lose root.
Click to expand...
Click to collapse
I am aware that once I got to PD1, I will lose root. I am also aware that I need to downgrade to PB1 and get root working again, but that is my precise problem. I have gotten back to PB1 flashing PB1 image, but I can't seem to get it rooted, at least not by following the directions mentioned on http://forum.xda-developers.com/verizon-galaxy-s5/general/root-method-og5-ok3-t3290370.
Question. After flashing back to PB1, do you I need to flash the PB1 bootloader? For some reason, I am unable to root when I get back to PB1.

Uptime73 said:
I am aware that once I got to PD1, I will lose root. I am also aware that I need to downgrade to PB1 and get root working again, but that is my precise problem. I have gotten back to PB1 flashing PB1 image, but I can't seem to get it rooted, at least not by following the directions mentioned on http://forum.xda-developers.com/verizon-galaxy-s5/general/root-method-og5-ok3-t3290370.
Question. After flashing back to PB1, do you I need to flash the PB1 bootloader? For some reason, I am unable to root when I get back to PB1.
Click to expand...
Click to collapse
You don't need to flash PB1 bootloader. Did you try install Kroot manually as suggested? Please show me where it failed? Did you run root.bat and if not working install Kroot manually and run roo2.bat.
Sent from my SM-G900V using Tapatalk

buhohitr said:
You don't need to flash PB1 bootloader. Did you try install Kroot manually as suggested? Please show me where it failed? Did you run root.bat and if not working install Kroot manually and run roo2.bat.
Sent from my SM-G900V using Tapatalk
Click to expand...
Click to collapse
I can tell you that when I tried to run the root and root2 batch files, I got a message that said the files were missing, so I looked at the root.bat file, and I ran the individual tasks in the batch file manually., including the manual install of king root. When I ran king root, it said no methods were available.

Uptime73 said:
I can tell you that when I tried to run the root and root2 batch files, I got a message that said the files were missing, so I looked at the root.bat file, and I ran the individual tasks in the batch file manually., including the manual install of king root. When I ran king root, it said no methods were available.
Click to expand...
Click to collapse
Try to run the bat files in regular mode too, not as administrator.
Sent from my SM-G900V using Tapatalk

buhohitr said:
Try to run the bat files in regular mode too, not as administrator.
Sent from my SM-G900V using Tapatalk
Click to expand...
Click to collapse
Thank you so very much!!! I ran the root.bat file in regular mode, and not as administrator, and it worked!!! I didn't think it would matter, but apparently it did. I now have root access on PB1. Unfortunately, I am unable to unlock the bootloader as I have a Toshiba 11 emmc.

Problem after flashing firmware and skipping Supersu

So recently I wanted to flash 20a via twrp on my G5 but it wasn't working. I reflashed 10i and my phone didn't want to boot up. So I decided to charge my phone after reflashing 10i once again without flashing supersu and I powered off the device and it turned back on with the "Your device is corrupt and it cannot be trusted sign" and so I tried to boot to recovery and my phone just factory reseted itself. I tried to boot into recovery with adb but to no avail. I even tried to flash 10d kdz and 10d tot both getting an error on LGUP and my phone is still stuck on firmware 10i. I even get an error when trying to update it with stock recovery. So now I have a phone with an unlocked boot loader and I cannot reroot again. Is there a way I can regain root? I knew I should have flashed supersu

RicardoSal24 said:
So recently I wanted to flash 20a via twrp on my G5 but it wasn't working. I reflashed 10i and my phone didn't want to boot up. So I decided to charge my phone after reflashing 10i once again without flashing supersu and I powered off the device and it turned back on with the "Your device is corrupt and it cannot be trusted sign" and so I tried to boot to recovery and my phone just factory reseted itself. I tried to boot into recovery with adb but to no avail. I even tried to flash 10d kdz and 10d tot both getting an error on LGUP and my phone is still stuck on firmware 10i. I even get an error when trying to update it with stock recovery. So now I have a phone with an unlocked boot loader and I cannot reroot again. Is there a way I can regain root? I knew I should have flashed supersu
Click to expand...
Click to collapse
I bet you didn't followed or read the 20a thread by autoprime nor did you bothered to read the TWRP thread as well. there's still a bug that prohibits you to downgrade from 20a unless you have a nandroid backup or a twrp recovery backup for the 10i. best option for now is to go back to 20a and wait for an update from the devs on fixing TWRP or try to follow the dirtycow method.

Jaistah said:
I bet you didn't followed or read the 20a thread by autoprime nor did you bothered to read the TWRP thread as well. there's still a bug that prohibits you to downgrade from 20a unless you have a nandroid backup or a twrp recovery backup for the 10i. best option for now is to go back to 20a and wait for an update from the devs on fixing TWRP or try to follow the dirtycow method.
Click to expand...
Click to collapse
The problem was that for some reason I couldn't update it but please pass the link to dirtycows :good:

RicardoSal24 said:
The problem was that for some reason I couldn't update it but please pass the link to dirtycows :good:
Click to expand...
Click to collapse
Look under the dev thread on autoprime topic about the stock N zips, if you read through last few pages you'll find all the links you need for recowvery to get root and twrp. Also if you're on 10i, why not just use lg up (make sure you either use older version or autoprime uppercut app) to flash 10D tot that already has twrp and then upgrade to stock 7 through twrp. Either way, all the info you need should be in last 3 pages of that thread by autoprime.
*** Edit ***
Just reread your post. If your getting errors flashing the 10D tot it's most likely due to you updating lg up, the .DLL, etc to install N. If so, uninstall lg up, and then download the lg up files and. DLL from the 10D thread. You can try uppercut app too as it's supposed to work between versions but I have not tested it myself. If all else fails then use the recowvery method.

jeffsga88 said:
Look under the dev thread on autoprime topic about the stock N zips, if you read through last few pages you'll find all the links you need for recowvery to get root and twrp. Also if you're on 10i, why not just use lg up (make sure you either use older version or autoprime uppercut app) to flash 10D tot that already has twrp and then upgrade to stock 7 through twrp. Either way, all the info you need should be in last 3 pages of that thread by autoprime.
*** Edit ***
Just reread your post. If your getting errors flashing the 10D tot it's most likely due to you updating lg up, the .DLL, etc to install N. If so, uninstall lg up, and then download the lg up files and. DLL from the 10D thread. You can try uppercut app too as it's supposed to work between versions but I have not tested it myself. If all else fails then use the recowvery method.
Click to expand...
Click to collapse
I've tried uppercut and I still get errors. I want to downgrade using the kdz file but the link is broken for me. Though I will try an older version of lgup. Thanks :good:

RicardoSal24 said:
I've tried uppercut and I still get errors. I want to downgrade using the kdz file but the link is broken for me. Though I will try an older version of lgup. Thanks :good:
Click to expand...
Click to collapse
Yeah not sure about uppercut. If you're still on 10i you should be fine using lgup to downgrade as long as you use the right version of lgup and h830 .DLL file. Also I'm not sure you can use refurbish option with kdz, but I know you can with tot. So maybe downgrade to 10D using tot and upgrade through twrp. If all else fails, use the recowvery steps on the above linked thread and you should be all good. Quick question, when you first start your phone, does it just show phone can not be checked for corruption or does it show the message can't be checked for corruption and visit this site... Etc. ? Reason I ask is the second message is updated bootloader and you won't be able to use lg up to flash MM firmware until you downgrade your bootloader.

jeffsga88 said:
Yeah not sure about uppercut. If you're still on 10i you should be fine using lgup to downgrade as long as you use the right version of lgup and h830 .DLL file. Also I'm not sure you can use refurbish option with kdz, but I know you can with tot. So maybe downgrade to 10D using tot and upgrade through twrp. If all else fails, use the recowvery steps on the above linked thread and you should be all good. Quick question, when you first start your phone, does it just show phone can not be checked for corruption or does it show the message can't be checked for corruption and visit this site... Etc. ? Reason I ask is the second message is updated bootloader and you won't be able to use lg up to flash MM firmware until you downgrade your bootloader.
Click to expand...
Click to collapse
Updated bootloader? I had no idea that was a problem. But since I'm on 20a i get the corruption message plus the link so O guess my bootloader is upgraded. How exactly DO you downgrade the bootloader?
I will mention that I'm stuck without twrp

RicardoSal24 said:
Updated bootloader? I had no idea that was a problem. But since I'm on 20a i get the corruption message plus the link so O guess my bootloader is upgraded. How exactly DO you downgrade the bootloader?
I will mention that I'm stuck without twrp
Click to expand...
Click to collapse
Okay since you have an upgraded bootloader and no twrp you will have to follow the steps in that post for recowvery which will give you Root and twrp. Once you have twrp, download the bootloader zip for whichever version you're planning on downgrading to (I.e. 10I bootloader if flashing 10i kdz) from autoprime and flash in twrp. You can also flash the complete zip (i.e. 10I complete zip) in twrp after flashing the 10I bootloader if you want to keep root and twrp (you will also have to flash SuperSU after flashing those files). But you can also flash kdz or tot with lg up after downgrading bootloader via twrp but you will lose root and twrp unless you flash 10D rooted tot.

jeffsga88 said:
Okay since you have an upgraded bootloader and no twrp you will have to follow the steps in that post for recowvery which will give you Root and twrp. Once you have twrp, download the bootloader zip for whichever version you're planning on downgrading to (I.e. 10I bootloader if flashing 10i kdz) from autoprime and flash in twrp. You can also flash the complete zip (i.e. 10I complete zip) in twrp after flashing the 10I bootloader if you want to keep root and twrp (you will also have to flash SuperSU after flashing those files). But you can also flash kdz or tot with lg up after downgrading bootloader via twrp but you will lose root and twrp unless you flash 10D rooted tot.
Click to expand...
Click to collapse
Can you please give the link to the thread you're talking about?

RicardoSal24 said:
Can you please give the link to the thread you're talking about?
Click to expand...
Click to collapse
The thread is:
http://forum.xda-developers.com/tmobile-lg-g5/development/stock-h830-20a-rom-flashable-zips-imgs-t3511294
If you're just trying to get twrp and root to downgrade look at the last 5 or so pages and look for the recowvery post. Once you do that visit:
http://forum.xda-developers.com/tmobile-lg-g5/development/stock-h830-10j-rom-flashable-zips-imgs-t3491363
and download the bootloader zip and then boot into twrp and flash the bootloader zip. Then you can use lg up to flash kdz file or tot file. If you want to do everything from twrp and skip lg up step just download the complete zip from the 10J thread and flash in twrp after flashing bootloader, then if you want to keep twrp and root make sure after flashing bootloader and complete zip in twrp flash SuperSU before rebooting.

jeffsga88 said:
The thread is:
http://forum.xda-developers.com/tmobile-lg-g5/development/stock-h830-20a-rom-flashable-zips-imgs-t3511294
If you're just trying to get twrp and root to downgrade look at the last 5 or so pages and look for the recowvery post. Once you do that visit:
http://forum.xda-developers.com/tmobile-lg-g5/development/stock-h830-10j-rom-flashable-zips-imgs-t3491363
and download the bootloader zip and then boot into twrp and flash the bootloader zip. Then you can use lg up to flash kdz file or tot file. If you want to do everything from twrp and skip lg up step just download the complete zip from the 10J thread and flash in twrp after flashing bootloader, then if you want to keep twrp and root make sure after flashing bootloader and complete zip in twrp flash SuperSU before rebooting.
Click to expand...
Click to collapse
Is there a video using the g5? I found only one and thats with the v20 and the guy in the video doesn't have much of a close up to his laptop

RicardoSal24 said:
Is there a video using the g5? I found only one and thats with the v20 and the guy in the video doesn't have much of a close up to his laptop
Click to expand...
Click to collapse
I don't think so but not 100% sure. If you follow the steps carefully you'll be fine. I didn't directly post the recowvery steps as I have not used this (I've had twrp and root since 10D). You can look on the v20 thread as it has a post for the v20 and our h830 recowvery method. Sorry I can't be more help with that specifically.

jeffsga88 said:
I don't think so but not 100% sure. If you follow the steps carefully you'll be fine. I didn't directly post the recowvery steps as I have not used this (I've had twrp and root since 10D). You can look on the v20 thread as it has a post for the v20 and our h830 recowvery method. Sorry I can't be more help with that specifically.
Click to expand...
Click to collapse
You were helpful enough :good:

Can I downgrade back to marshmallow

I'm on stock nougat is there a way to go back to stock marshmallow it just worked better for me.

Shamec said:
I'm on stock nougat is there a way to go back to stock marshmallow it just worked better for me.
Click to expand...
Click to collapse
Yes you can. If you have TWRP, download the complete zip for 10J and the 10J bootloader. GoTo TWRP and flash the 10J bootloader, then flash 10J complete zip and afterwards flash no verity and SuperSU. If you don't have TWRP, you need to use the recowvery script to install TWRP and then follow the above steps. Also, if you don't want root or TWRP afterwards just run recowvery to install TWRP and install the 10J bootloader. Then you can use the 10J kdz through lgup. If you used lgup to upgrade to N make sure to get the older version of lgup and the .DLL or try uppercut to downgrade. But, bootloader must be downgraded to the bootloader from MM first before you can downgrade to MM.

Ok thanks. I have been trying to get twrp on using my mac running Windows in vmware but it will not recognize phone in fastboot. It only sees it when phone is booted up. I will try on my wife's Windows computer and see. Thanks a lot!!!

Shamec said:
Ok thanks. I have been trying to get twrp on using my mac running Windows in vmware but it will not recognize phone in fastboot. It only sees it when phone is booted up. I will try on my wife's Windows computer and see. Thanks a lot!!!
Click to expand...
Click to collapse
All you need is an ADB Shell to run the Recowvery Exploit and get TWRP, then flash your Android M and you good.
Try this out:
https://forum.xda-developers.com/showpost.php?p=70321075&postcount=10

ok used the recowvery exploit and that worked to get root and twrp. I didn't try to downgrade back to marshmallow yet.

T-Mobile LGV20 H91810k KDZ

have at it folks... grabbed from LG Bridge and updated from it as well... https://drive.google.com/open?id=0B6Wj13Rw1kw-U1JCZlhhWE9ULVk
EDIT: you will lose root and TWRP if you flash this, as this brings you back to stock. if you want root, downgrade to 10j, root, install TWRP, then flash 10k which can be found here https://forum.xda-developers.com/v20/how-to/h918-twrp-flashable-stock-firmwares-t3619671

can this preserve root?

shadow322 said:
can this preserve root?
Click to expand...
Click to collapse
no... flashing this KDZ, which was provided straight from the source, will bring your device to complete stock and lose root. I'm uploading a flashable zip of this release that should RETAIN root provided you have root and TWRP now.

i have a problem, i cant install TWRP on this firmware, I followed many of instrucctions but i cant install, anybody have this problem???

anayely said:
i have a problem, i cant install TWRP on this firmware, I followed many of instrucctions but i cant install, anybody have this problem???
Click to expand...
Click to collapse
you need to downgrade to 10j to be able to root/install TWRP. after that, flash the 10k package found here https://forum.xda-developers.com/v20/how-to/h918-twrp-flashable-stock-firmwares-t3619671

Can I use LGUp...?
Good day,
First, let me say THANKS for an amazing effort! I've been successful in rooting by installing the H91810j image and performing the dirtycow exploit.
Now, I'm wondering if I can update to H91810k, and still preserve root access, by using LGUp to install the modified 10k image you posted...?
Let me know... Thanks!

Ok I got a V20 today and it came out if the box with 10K is it possible to root possibly through downgrading in lgup or am I going to have to not update and wait for a root for 10k I'm on T-Mobile variant

Drop to 10j...
Joe199799 said:
Ok I got a V20 today and it came out if the box with 10K is it possible to root possibly through downgrading in lgup or am I going to have to not update and wait for a root for 10k I'm on T-Mobile variant
Click to expand...
Click to collapse
As far as I've been able to find out (since I was in the same boat), 10k has not been successfully 'rooted' as yet. You'll need to load H91810j and use the dirtycow exploits to enable root.
Once that's done, THEN you can install the modified version of H91810k mentioned earlier in this thread. Be sure it's the modded version, if you expect to keep root access.

kc7gr said:
As far as I've been able to find out (since I was in the same boat), 10k has not been successfully 'rooted' as yet. You'll need to load H91810j and use the dirtycow exploits to enable root.
Once that's done, THEN you can install the modified version of H91810k mentioned earlier in this thread. Be sure it's the modded version, if you expect to keep root access.
Click to expand...
Click to collapse
Thanks for the info how would I go about loading 10j, is it possible to downgrade to 10j for instance and if so how would I do that I've read up on dirty cow it seems difficult but it's not my first time rooting with adb and fastboot

Joe199799 said:
Ok I got a V20 today and it came out if the box with 10K is it possible to root possibly through downgrading in lgup or am I going to have to not update and wait for a root for 10k I'm on T-Mobile variant
Click to expand...
Click to collapse
you'll need to downgrade to 10j with the KDZ, root, install TWRP, then flash the zip here https://forum.xda-developers.com/v20/how-to/h918-twrp-flashable-stock-firmwares-t3619671 to bring yourself to 10k while still retaining root

Can this kdz be used on an h910 as well? I understand the hardware is the same, but I would rather not brick the device.

drCNC said:
Can this kdz be used on an h910 as well? I understand the hardware is the same, but I would rather not brick the device.
Click to expand...
Click to collapse
unfortunately I do not have a h910 so I can't comment on that

Sorry if this is a stupid question, but.. I am returning a t-mobile v20 that has unlocked bootloader... Need to relock that? I will google how to do that? Think I need a kdz?..Just got replacement with H91810K that I want to unlock and root.. realize I need to downgrade, but just looking for a thread on downgrading I think.. All help sincerely appreciated. Thanks in advance

drumrjoe said:
Sorry if this is a stupid question, but.. I am returning a t-mobile v20 that has unlocked bootloader... Need to relock that? I will google how to do that? Think I need a kdz?..Just got replacement with H91810K that I want to unlock and root.. realize I need to downgrade, but just looking for a thread on downgrading I think.. All help sincerely appreciated. Thanks in advance
Click to expand...
Click to collapse
I believe all you need to do is boot into fastboot thru ADB and type fastboot oem lock. I may be wrong on the typing part. But that's the general idea. Find out what command unlocks and just do the opposite and type lock instead.

dimm0k said:
you'll need to downgrade to 10j with the KDZ, root, install TWRP, then flash the zip here https://forum.xda-developers.com/v20/how-to/h918-twrp-flashable-stock-firmwares-t3619671 to bring yourself to 10k while still retaining root
Click to expand...
Click to collapse
Can we use uppercut with this KDZ?
Thx

Link was dead. KDZs are here:
https://lg-firmwares.com/lg-h918tn-firmwares/

T-Mobile LG G5 on stock Oreo (H83030c)

Is there a way to install a custom ROM on a LG G5 running stock Oreo? Can the stock firmware be downgraded to one of the stock nougat builds to help with bootloader unlock and TWRP install?

subaron said:
Is there a way to install a custom ROM on a LG G5 running stock Oreo? Can the stock firmware be downgraded to one of the stock nougat builds to help with bootloader unlock and TWRP install?
Click to expand...
Click to collapse
Yes, you can downgrade 30c to 20a, then unlock bootloader and install TWRP.

Is there a guide on how to do this? Thanks

I never found a solution to this and ended up getting a new phone. But that new phone just brokeand I am back to using the LG G5 again.
So now I am looking for a way to downgrade to 20a and the files needed to unlock the bootloader.
Appreciate any help provided.

subaron said:
I never found a solution to this and ended up getting a new phone. But that new phone just brokeand I am back to using the LG G5 again.
So now I am looking for a way to downgrade to 20a and the files needed to unlock the bootloader.
Appreciate any help provided.
Click to expand...
Click to collapse
Here this should help
https://www.youtube.com/watch?v=EOwYONhW0xE

subaron said:
I never found a solution to this and ended up getting a new phone.
Click to expand...
Click to collapse
Hi subaron what version are you on now? If you are on the latest 30C then you need to downgrade to 20A stock ROM first.
You must download the 20A kdz file and flash it with UPPERCUT. Then you enable Developer Options and can follow the info in this thread on how to install TWRP recovery and root. The only thing different from those directions is: instead of SuperSU, install Magisk.
Once you have rooted 20A with TWRP installed, then you copy the 30C COMPLETE .zip to the sdcard, reboot into recovery, and install that and install Magisk once again.