Downgrade from latest LS990 firmware - G3 Q&A, Help & Troubleshooting

Does anyone know if there is an established way to downgrade from ZVI to any previous firmware? For example, would the method listed here be bad for any obvious reason?
My goal is to root my phone, flash a custom recovery, and finally flash a custom rom but it seems that everyone on ZVI has not found a way to root successfully. I've tried the one-click method, as well as the script to no avail.
Thanks!

Google LG ls990 return to stock xda
You will find a thread with 2 options.
Use the 2nd. You will need PC, USB cable turn on developer options and USB debugging
Have to download a .tot file and LG flash software
On windows 10 I had to run in compatability mode, worked on previous versions of windows, pick windows 7
You have to use adb commands in thread.
Anyways after you get back to stock. Upgrade using ota all the way to zvb. Then you can use the adb commands to root. Then download twrp official app from okay store and use that with root access to install twrp.
---------- Post added at 06:07 PM ---------- Previous post was at 06:06 PM ----------
That link will work.

peterl23451 said:
Google LG ls990 return to stock xda
You will find a thread with 2 options.
Use the 2nd. You will need PC, USB cable turn on developer options and USB debugging
Have to download a .tot file and LG flash software
On windows 10 I had to run in compatability mode, worked on previous versions of windows, pick windows 7
You have to use adb commands in thread.
Anyways after you get back to stock. Upgrade using ota all the way to zvb. Then you can use the adb commands to root. Then download twrp official app from okay store and use that with root access to install twrp.
---------- Post added at 06:07 PM ---------- Previous post was at 06:06 PM ----------
That link will work.
Click to expand...
Click to collapse
Peter , I don't see a link . I too am trying to find a way to downgrade from ZVI . I've never taken an LG phone back to stock or downgraded stock . I'm use to samsung and don't want to brick my phone . I'm still trying to find the thread you mentioned with 2 options . Were you on ZVI ? thanks

Sorry. Been MIA. Seems that thread was removed by admins. The one you posted first should work fine as it sounds like exactly what I did.
Can't remember exactly but I'd say the phone was updated OTA as far as it could before this rollback.
Hope you got it all worked out.
G3 was and still is just a backup for me.

Related

[Failed] Root for LG Devices on Lollipop

This Link here demonstrates successful rooting of LG Devices. A list of tested devices is there. I have tried this method on my F240K but it just keeps sitting there on last step after executing root script.
Other people are welcomed to test it on stock lollipop. Maybe it works.
khan.orak said:
This Link here demonstrates successful rooting of LG Devices. A list of tested devices is there. I have tried this method on my F240K but it just keeps sitting there on last step after executing root script.
Other people are welcomed to test it on stock lollipop. Maybe it works.
Click to expand...
Click to collapse
me also same stuck at root script trying to root f240L(5.0.1). tried different ports nothing worked
How to root 5.0
Can't we root LG G Pro 5.0.1?
Guys please let me know if you were able to root your stuck lolipop on F240l.
did u try towel root and then download super or flash after install????
bountyman334 said:
did u try towel root and then download super or flash after install????
Click to expand...
Click to collapse
I haven't tried that no.
Same here stuck at the last script. Did anyone else found solution?
me, too. still waiting for solution.
go tolg g3 optimus and download tr.apk and that should work
bountyman334 said:
go tolg g3 optimus and download tr.apk and that should work
Click to expand...
Click to collapse
Towelroot is not working seen it before
found that srsroot and oneclickroot can root f240l(5.0.1).
srsroot did not worked for me.
oneclick root is a paid one so i can' t try .
you guys can try.
any one please share the working official 4.4.2 kdz file link
harshao said:
found that srsroot and oneclickroot can root f240l(5.0.1).
srsroot did not worked for me.
oneclick root is a paid one so i can' t try .
you guys can try.
Click to expand...
Click to collapse
no luck with SRSROOT and this new one
anyone succeed ?
masjai said:
no luck with SRSROOT and this new one
anyone succeed ?
Click to expand...
Click to collapse
tried this it is not working actually the phone is not going into download mode automatically(which it is supposed to, according to the script). if we go into download mode manually it is not detecting our phone.
---------- Post added at 05:06 AM ---------- Previous post was at 05:00 AM ----------
hoping on this http://forum.xda-developers.com/opt...rmware-lg-f240l-fixed-korean-winmack-t3060414
hard to find 4.4.2 official kdz.
harshao said:
tried this it is not working actually the phone is not going into download mode automatically(which it is supposed to, according to the script). if we go into download mode manually it is not detecting our phone.
---------- Post added at 05:06 AM ---------- Previous post was at 05:00 AM ----------
hoping on this http://forum.xda-developers.com/opt...rmware-lg-f240l-fixed-korean-winmack-t3060414
hard to find 4.4.2 official kdz.
Click to expand...
Click to collapse
Don't waste your time, he password his zip file....!
masjai said:
Don't waste your time, he password his zip file....!
Click to expand...
Click to collapse
Sent a mail to him regarding the link and password waiting for his reply.
Cant root f240L on 5.0.1
If anyone have rooted on LP plz help
There is stock by bountyman take a look http://forum.xda-developers.com/optimus-g-pro/development/mar-0-lollipop-g-pro-v1-t3043779
Inform here so that we can proceed further....

Upgrading to 5.1.1

I'm trying to upgrade the G3 from 5.0.1 to 5.1.1. I couldn't find a stock image to download and flash. If there is one could someone point it out for me?
Anyways, I was going to update via OTA instead and removed SU, however I'm guessing because TWRP is still installed it failed. How can I get back to stock recovery to flash the OTA so that I can re-root afterwards?
http://forum.xda-developers.com/tmobile-lg-g3/general/firmware-t-mobile-lg-g3-t2818667
mitbit2k3 said:
http://forum.xda-developers.com/tmobile-lg-g3/general/firmware-t-mobile-lg-g3-t2818667
Click to expand...
Click to collapse
That thread is for 5.0.1 (20E). Would also like to know if 5.1.1 is coming to the G3 as well.
---------- Post added at 04:26 PM ---------- Previous post was at 04:19 PM ----------
Looks like we may be skipped for 5.1.1 and go right to Android M -
http://www.gottabemobile.com/2015/06/29/lg-g3-android-5-1-update-what-you-need-to-know/
You asked how to go back to a stock image w/ stock recovery... the link mitbit2k3 linked you to has the directions for doing so (20e is the latest version T-Mobile has released). And you never want do take an OTA update w/ a custom recovery like TWRP installed.

I need help

Hello xda. I have lg g3sd722 my problem is cant root my device.. Presently i update my phone to v20d i think. But i cant root my phone.. I try with kingroot. Lg one click and some other programs.. Can i downgrade on factory version? I cant use the twrp recovery... Help me pleaseee
tot back stock to oldest firmware i dont know about ure specific device but ure updated ota may have all the exploits patched if u want to update find a updated rooted rom and flash through twrp
if u find this post helpful remeber the thanks button
---------- Post added at 02:16 AM ---------- Previous post was at 02:14 AM ----------
i personally use the d850 att vrsion and i keep it on kk just because i know all exploits are mainly still vunrable
If you haven't already, try the second method in this thread...
[GUIDE][ROOT] Newest Root Method for LG devices
http://forum.xda-developers.com/lg-g3/general/guide-root-method-lg-devices-t3129197
Download and extract the New_LG_Root_v0.1_by_dig.zip file from the OP, then open a command prompt w/ admin rights from within the extracted directory.
feikacab said:
Hello xda. I have lg g3sd722 my problem is cant root my device.. Presently i update my phone to v20d i think. But i cant root my phone.. I try with kingroot. Lg one click and some other programs.. Can i downgrade on factory version? I cant use the twrp recovery... Help me pleaseee
Click to expand...
Click to collapse
And don't forget to enable ADB.. its stupid but I've seen many people forget to enable it here.

downgrading from mm to to kit kat ?

hello i have a question im sick of the terrible battery life on my note 4 ever since i did the mm update i have bad lbattery life i have tried batterys factory reset and its still the same so i want to downgrade to kit kat im completly stock no root or anything is there anyway to do this if so can u give me step by step and how to ?? im not very computer ilerterate so the simplest and most effective way would be great thank you
search how to use a program called Odin to install kit Kat. searching both these forums and Google, and even YouTube, will yield a lot of results
Sent from my SM-N910V using Tapatalk
Hello there
Since you posted under Verizon Note 4 The link below provides all the firmware for Verizon Note 4. The instructions are there as well. However, it is best if before hand you research odin.
http://forum.xda-developers.com/not...mware-firmware-kernel-modem-recovery-t2942937
question what version of odin do i use the one for marshmellow or the one for kit katt or bolth?
another question how do i get the system update notification off after i do the downgrade is there a way without rooting?? ive looked online theres not much out there if someone could send me some links on the whole procedure from downgrading to what backup u used to store everything and how to get rid of the notifications would be greatly helpfull
ANYONE??
Well first off you can't downgrade. Straight from mm with a locked bootloader. You have to unlock your bootloader first. There are methods. Do not know about unlocking it on mm with out having it unlocked before from LP. I too wanted kitkat. If you proceed and unlock the bootloader you can downgrade to LP bootloader and then proceed to unlock the LP bootloader after that install twrp and I'll send a link on a post I made how to install kitkat on 5.1.1 bootloader.
---------- Post added at 09:16 PM ---------- Previous post was at 09:07 PM ----------
http://forum.xda-developers.com/not...tkat-5-1-1-t3432452/post68399229#post68399229
---------- Post added at 09:21 PM ---------- Previous post was at 09:16 PM ----------
http://forum.xda-developers.com/devdb/project/dl/?id=18880
Download this file flash it with odin. You will be on lollipop but a mm bootloader. It is root able and after you unlock the bootloader you flash the 5.1.1 full firmware you can find in one of he posts someone up above sent. After that proceed again to root and unlock bootloader.
---------- Post added at 09:23 PM ---------- Previous post was at 09:21 PM ----------
This link is how to upgrade and unlock mm bootloader. Just flash the file with odin I sent before this post and follow instructions on how to root and unlock.
u have to root to downgrade?
blaze86dubz said:
u have to root to downgrade?
Click to expand...
Click to collapse
Yep. And you need the bootloader unlocked (root is pretty pointless if u cant unlocked the bootloader)

Rooting failed due to "Failed to mount /cpefs:read only" error in twrp.

I was rooting my S9 (G960F) but even after format data, the error would not go away.
I've tried to flash nemesis kernel too in case it would be to blame, and did not forget oem unlock, dm verity or oem patch too.
Anyone having the solution to this?
Or please link a guide which worked for you.
Thanks!
Are you running the stock rom? Did you root via Odin first?
yes, i am running the stock rom, this message appeared immediately after flashing the twrp from odin.
i don't get what you mean by asking if i rooted the phone from odin before it, the only way of rooting i knew was to flash twrp and then supersu zip along with dm verity, oem patch etc.
Samaksh. said:
yes, i am running the stock rom, this message appeared immediately after flashing the twrp from odin.
i don't get what you mean by asking if i rooted the phone from odin before it, the only way of rooting i knew was to flash twrp and then supersu zip along with dm verity, oem patch etc.
Click to expand...
Click to collapse
Flash the Stock ROM and try to root it again by using the method from this video
Or if you don't want to flash the stock and do all the steps, Just flash the files mentioned in that video and do the same steps. It should work.
Flash the latest twrp version
This error is present in old version and BTW it does not have any implication on flashing or. Root process download magisk 16.4 version from twrp thread and then flash that u'll get root.
---------- Post added at 08:31 PM ---------- Previous post was at 08:31 PM ----------
Flash the latest twrp version
This error is present in old version and BTW it does not have any implication on flashing or. Root process download magisk 16.4 version from twrp thread and then flash that u'll get root.
---------- Post added at 08:32 PM ---------- Previous post was at 08:31 PM ----------
Flash the latest twrp version
This error is present in old version and BTW it does not have any implication on flashing or. Root process download magisk 16.4 version from twrp thread and then flash that u'll get root.
muhammadshais said:
Flash the latest twrp version
This error is present in old version and BTW it does not have any implication on flashing or. Root process download magisk 16.4 version from twrp thread and then flash that u'll get root.
---------- Post added at 08:31 PM ---------- Previous post was at 08:31 PM ----------
Flash the latest twrp version
This error is present in old version and BTW it does not have any implication on flashing or. Root process download magisk 16.4 version from twrp thread and then flash that u'll get root.
---------- Post added at 08:32 PM ---------- Previous post was at 08:31 PM ----------
Flash the latest twrp version
This error is present in old version and BTW it does not have any implication on flashing or. Root process download magisk 16.4 version from twrp thread and then flash that u'll get root.
Click to expand...
Click to collapse
I do not recommend Magisk at this point. The phone will bootloop. Only unofficial version is working. For that you can use this thread. And at some point if you update it, it will go into bootloop as well.
Its better to stick with SuperSU (V2.82 and Above) for now.
I hope someone can explain what's happening...I've always rooted my phones, but this one doesn't want to give up!!
I've installed TWRP no problem and the all the rest of the files in the exact order suggested in the video, but I don't seem to be able to get root. Everything installs without error messages (I solved the problem in OP by installing the patched TWRP). but I don't seem to get where I go wrong...... Needless to say, OEM unlock is on.
Can anyone help?
Thanks
PS. Where can I find the stock rom so I can flash via TWRP and start from scratch?
Killer333 said:
Flash the Stock ROM and try to root it again by using the method from this video
Or if you don't want to flash the stock and do all the steps, Just flash the files mentioned in that video and do the same steps. It should work.
Click to expand...
Click to collapse
Thanks, i'll try this out, i had already flashed the stock rom yesterday and retried root, still gave an error message, still worth a try
astrovale said:
I hope someone can explain what's happening...I've always rooted my phones, but this one doesn't want to give up!!
I've installed TWRP no problem and the all the rest of the files in the exact order suggested in the video, but I don't seem to be able to get root. Everything installs without error messages (I solved the problem in OP by installing the patched TWRP). but I don't seem to get where I go wrong...... Needless to say, OEM unlock is on.
Can anyone help?
Thanks
PS. Where can I find the stock rom so I can flash via TWRP and start from scratch?
Click to expand...
Click to collapse
I downloaded stock from sammobile, because updato.com was giving even worse speeds, it took like 8 hours, so beware.
Also, what is this patched twrp? And where can i get a link?
muhammadshais said:
Flash the latest twrp version
This error is present in old version and BTW it does not have any implication on flashing or. Root process download magisk 16.4 version from twrp thread and then flash that u'll get root.
---------- Post added at 08:31 PM ---------- Previous post was at 08:31 PM ----------
Flash the latest twrp version
This error is present in old version and BTW it does not have any implication on flashing or. Root process download magisk 16.4 version from twrp thread and then flash that u'll get root.
---------- Post added at 08:32 PM ---------- Previous post was at 08:31 PM ----------
Flash the latest twrp version
This error is present in old version and BTW it does not have any implication on flashing or. Root process download magisk 16.4 version from twrp thread and then flash that u'll get root.
Click to expand...
Click to collapse
I think i flashed the latest one, which was 3.2.1-1 from official website, is there a newer one available?
If so, please share the link
I had those errors but the process continued seemingly ok.
used a modified magisk 16.3
however now the phone constantly freezes on AOD....
thinking of switching to superSU till magisk stabilizes
any suggestions?

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