LG G3 D852 downgrade from 6.0 to 5.0 Lollipop - G3 Q&A, Help & Troubleshooting

I have been trying to root my LG G3 D852 on 6.0 mm, i have found that there is nothing out for that yet. I know know that have to downgrade and I have tried but since I'm on virgin mobile so the downgrade file I tried to use bricked my phone so i had to send it back to LG to get it fixed. Is there any other way to downgrade or root without bricking my phone again?
Thanks

Same problem...
lukasblock05 said:
I have been trying to root my LG G3 D852 on 6.0 mm, i have found that there is nothing out for that yet. I know know that have to downgrade and I have tried but since I'm on virgin mobile so the downgrade file I tried to use bricked my phone so i had to send it back to LG to get it fixed. Is there any other way to downgrade or root without bricking my phone again?
Thanks
Click to expand...
Click to collapse
Hmmm. I had the same problem as you did with my G3. Same model and everything. Tried to downgrade it using my computer. Can't remember what tool, but it said it completed successfully. When it went to reboot, it would stay on the LG logo for 15-30 seconds, before going to the broken android screen. After a few minutes, it would reboot. Could enter into the recovery menu from the broken android screen, but when I tried to bump the files or flash a rom, there was nowhere on the phone to store it. I think it removed the partitions during the flash, hence why it couldn't store the files. It's not that I didn't have permission, but it showed in the console that there was no directory to mount. Couldn't even charge the phone in the state it was in. Guess it relied on the OS to control the charging. I'll probably try to simulate the phone, with the stock OS, and see if I can find any exploits that could allow for a "safer" rooting method. Tell me if you find anything yourself!

Related

LG G3 Endless Bootloop Logo->Firmware Update->Restart

Hey guys,
I really hope someone will be able to help me out.
I will try and provide as much information as possible.
I own an D855 bought from Germany. The phone originally came with the stock rom 4.4 I believe. I had rooted the phone using purple drake. few days ago I update the phone to 5.0 Lollipop, the official version rolled out by LG.
I lost the root after update and didn't re-root. Today during work my phone had gone into a boot loop (Logo->restart->logo-Restart). I though "okay that's fine , when I get home I'll look into the unbrick methods and fix this easily" Wrong.
I tried using the instructions provided by the user zedomax on youtu "How to Unroot/Unbrick LG G3!"
Downloaded all the drivers and the LG g3 Flash tool. Also downloaded a European stock rom. I got to around the 6:35 mark on the video, removed the cable and replugged it. Then the phone just shutdown and started a boot loop again. The boot loop had now changed to Logo->Firmware update page->restart->logo->firmware update page->restart.
Now I can't put the phone into firmware update mode anymore and I am really scared the phone is hard bricked. What is the next thing I can try?
I am offering a 60€ bounty to whoever has a fix for this.
I can also try taking a video of the boot loop if that would be of any help.
If I would try and RMA the phone, does anyone know would there be any sign of rooting. I had previously had the phone rooted on the official 4.4 build (using purple drake) and then I updated to 5.0, but didn't root.
bumping thread
f400
i have same problem with g3 f400
please help me

Root and KDZ help.

I got my lg g4 yesterday and tried to root it using the little effort root and it didn't work. When it rebooted I the screen that says booting failed etc etc with the LG logo on it and it cut off. So I tried to kdz it back and I guess I chose the wrong KDZ and it just completely blacked out. Luckily they gave me another 1 (told them it wouldn't cut on after going dead) so I want to try rooting it again but I want to know which software version am I? In my settings it says vs98611A but under my battery it says vs986B. Which 1 is my kdz? And is there any other way to root this phone?
http://forum.xda-developers.com/g4/general/lg-g4-100-root-success-directives-root-t3180586
Worked for me on 13B.
Suggest you update to 13B using LGUP PC tool and 13B KDZ, then try rooting again with link posted.
How do I know that I'm not already on 13 b? This is all new to me
Settings - About phone - Software info - Software version.
Ok I see. I think what happened last time was I was on 13b and flashed a 11a kdz and that bricked my phone

Cannot Unroot/Stock! LG Suport Tool stuck at 4%. LG Flash Tool Stopped due an error

Hey Folks! I need help!
First sorry for my english, im from brazil.
I'm a Lawyer and i'm gonna sue LG company for a hardware problem ( SIM CARD REMOVED PROBLEM ). But my LG G3 have LG 6.0 Stock rom installed. I tried to root with King Root, it failed, but now even if i hard reset the phone it keeps installed!
(in brazil unlike USA, the company's don't support the costumer. They have given 1 year guarantee, i have the phone for 1 year and 1 month. They told can't help me but the brazilian Law says that if a unkown hardware problem appears then you have 90 days to sue the company.)
So i want to Go back to stock 4.4 ou 5.0, so if the judge need to avaliate, at least it will be known as unmodified.
When i updated to 6.0 Stock, i did with LG Flash tool 2014.
So i tried again to downgrade with LG Flash tool, but using the 20x kdz. I tried diferrent KDZ. My phone is D855P, tried D855 normal KDZ, tried 855P KDZ. but downgrade always failed " due to an error " on flash tool.
So i tried LG support Tool, gone do Download mode, but it stucks at 4%. ( and yes i tried to hard reset before starts the procedure.)
Someone can help me to unroot(i don't think is unrooted, but King root remain on the phone as a bloatware now), or return to 4.4 ou 5.0 stock?
thanks!:good:
Assuming you able to boot the phone, try to downgrade using LGUP instead lg flash tools
Sent from my LG-D855 using Tapatalk
wiwid.colgate said:
Assuming you able to boot the phone, try to downgrade using LGUP instead lg flash tools
Sent from my LG-D855 using Tapatalk
Click to expand...
Click to collapse
I was thinking about. As i already use "stock rom 6.0" and i just figured out how to uninstall "king root app". So now my Phone looks clean from bloatware. Guess now i can sue the company without being afraid of someone detect some mod on the smartphone.

Help save a bricked lg g3

:crying:
My issues is quite complicated. Please be patient and read on.
Less than a week ago, I bought an LG G3 D855. It wasn't brand new and definitely out of warranty.
It was on the 4.4.2 Os version but I couldn't update it because I couldn't locate the UPDATE CENTER and after some research online, I found out it was because it was rooted. I couldn't find a Supersu application anywhere on the phone anyways but Root checker confirmed that it was rooted.
I downloaded the stock kitkat firmware in a .tot format and I tried flashing using LG Flash Tool for TOT but it failed because "Device version is different"
I checked the Imei online and it stated that the device is a Sprint LS990 but the details embedded in the phone all say it is D855
I checked online and found a couple of posts about this error and one user said he was able to fix it by flashing the actual Sprint .tot with the lg flash tool. I tried that but it didn't work. It still said "Device version is different. Check BIN or dll"
I checked online and found results pointing to a generic .dll file for G3s and I downloaded it but when I used it on the Flash tool, it resulted to an error "CrossDL blah blah"
So I found a Marshmallow kdz file. LGUP won't see my device model so I was able to flash it after editting the software in my build.prop to D85510n.
***I have always changed the port to COM41 in all the steps I used
The LG UP detected my model and it flashed to 100% but got stuck on a bootloop by loading the lg screen, freezing and restarting by it self. It never gets to the homescreen.
I downloaded lollipop kdz reflashed using LGUP in a form of downgrade and it got to 100% and got stuck at the lg screen while trying to reboot.
I redownloaded the stock kitkat rom and used the Lg flash tool but it failed. It said 'PID null IMEI Null"
I used LGUP to reflashed. It came to my understanding that the LGUP can flash both kdz and tot. So it flashed to 100% but got stuck at the lg screen and I have tried all I can but it is stuck. It can go into download tho. I don't know what to do about the IMEI. I don't know if the last flash retrieved it. I don't kniw what to do.
It no longer shows as LGE AndroidNet USB Serial
Please can anyone help me?
I just need my phone to work again. I was stubborn and now I regret it. I should have just stuck to kitkat. I'm so desperate to get my phone working that I wouldn't mind Android Froyo Os if it was ever possible.
PLEASE HELP!!!
I think you have to repair the IMEI...
maybe this can help
https://youtu.be/nwzgs1Cmr9k
Sent from my LG-D855 using XDA Free mobile app
I think that he forgot to hard reset after flashing the kdz.
i completly know what you should do:
1: force your phone into qualcomm 9008 mod.
2: use board diag unbrick instruction and it will boot on download mod. for unbrick you will need best kitkat tot for your G3 model.
3: flash best lollipop or kitkat tot to make your phone alive
and then flash it with any kdz you want(it should be for your G3 model)
my telegram ID : @Erfan_rv
pls help me
Apparently, it seems my bricked phone keeps disconnecting during flashing process. I dont think it the fault of the cable because I have used different ones and they all seem to work fine with other phones. I have tried a different computer and still the same results. it connects as qualcom 9008 but once I try to start flashing, it disconnects and interrupts the flashing process. my phone just shows a grey screen now when I power it up with the battery in. also, I was trying to upgrade from linear os to the latest linear os. I cant fine the tot out there so im using zv6 currently. could this also be the problem? thanks in advance

LGFlashTool insanity.... helpppp

I have a g3 d855.
I was running 30b rooted and decided to tweek the ui soft keys (big mistake).
I ended up bricking but managed to use LGFlashTool without any problems to go back to stock "LGD855AT-00-V10e-EUR-XX-JUL-08-2014-32G+0.tot"
Then I installed 30n and found out it can't be bloody rooted.
I thought it would be simple to revert back to stock. 8 hours later and I am still stuck.
I keep getting "model information check fail!"
Is there any other tool for flashing the stock files as I am loosing my freaking mind here.:silly:
Thanks
Model
VictorJ1 said:
I have a g3 d855.
I was running 30b rooted and decided to tweek the ui soft keys (big mistake).
I ended up bricking but managed to use LGFlashTool without any problems to go back to stock "LGD855AT-00-V10e-EUR-XX-JUL-08-2014-32G+0.tot"
Then I installed 30n and found out it can't be bloody rooted.
I thought it would be simple to revert back to stock. 8 hours later and I am still stuck.
I keep getting "model information check fail!"
Is there any other tool for flashing the stock files as I am loosing my freaking mind here.:silly:
Thanks
Click to expand...
Click to collapse
Whats ur model and what rom u are talking about almoust every Version of G3 has root avalible
fk5122003 said:
Whats ur model and what rom u are talking about almoust every Version of G3 has root avalible
Click to expand...
Click to collapse
lg g3 d855
running D85530n_00_0816.kdz
king root was unable to root it unlike 30b that I had before, that's why I want to roll back to 30b
trying downgrade using lgup as I type, looks promising
lgup downgrade worked a treat :good:

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