Develop Bugs

[Q] [x-post from LG G3] D851 unroot / restore to stock

I recently picked up a D851 (TMobile). I rooted it, but did not replace the ROM or install a custom bootloader.
Last weekend, the phone started randomly rebooting. Watching logcat via adb showed me several random apps throwing sig11s, after which the phone would give up and reboot. Cycle repeats.
This looks like a hardware issue, as the apps that crash change on each boot cycle.
I arranged with TMobile to swap the device, but they cautioned me that the phone must be returned to an unrooted state.
I've had a hell of a time with it from here. My first try was to install the LG drivers and the PC Suite under a Windows VM, as I do not run Windows at home. Enabling USB passthrough for the phone to the VM let Windows see the phone, but the LG drivers would invariably fail with 'Device cannot start. Code 10.'. Likewise, the PC Suite couldn't find the phone.
Next step was to throw together some spare hw and install Windows 7 on that (a desparate move, to be certain. ). The LG drivers can now recognize the phone, so that's a definite plus. The LG PC Suite, though, claimed that my phone could not be upgraded. Wonderful.
Next step was to try this tutorial: http://www.androidrootz.com/2014/07/how-to-unroot-lg-g3-all-variants.html . I was able to get further with this method, but as it begins to flash SYSTEM, it pauses, and then dies with 'We can't communicate with Phone'. End result - I now have a soft bricked phone. On the phone, I see the port - COM41 - appear, and the usb animation starts to spin ... and after a few seconds, stops. It's at this point that Flashtool throws the Can't Connect error.
I next tried following this tutorial: http://forum.xda-developers.com/showthread.php?t=2785089 to flash a KDZ. The newer LG Flash tool used here can't create a connection to my phone for flashing.
I've run into a wall here. Any ideas on where to go next? I need to reset this phone back to a working stock state so that I can send it back.

http://lgg3root.com/lg-g3-root/how-to-unrootunbrick-lg-g3/
Use this and follow video carefully. Has worked many times. Use all his links not what you have downloaded.
NOTE 4

BACARDILIMON said:
http://lgg3root.com/lg-g3-root/how-to-unrootunbrick-lg-g3/
Use this and follow video carefully. Has worked many times. Use all his links not what you have downloaded.
NOTE 4
Click to expand...
Click to collapse
Also - as silly as it sounds, make certain you're using the USB cable that came with the phone. This has solved problems for a lot of people when trying to revert to stock.

etawful said:
Also - as silly as it sounds, make certain you're using the USB cable that came with the phone. This has solved problems for a lot of people when trying to revert to stock.
Click to expand...
Click to collapse
I wasn't initially, but I did switch to it last night. Still no go.
I suspect it's either the phone itself (see above: re suspected hw failure), or the PC in question (nVidia chipset on this old motherboard, and I've had more than a few problems with adb talking to phones on nVidia motherboards). I'm going to try Bacardilimon's suggestion tonight, on a PC that has *nothing* nVidia-related in it, before I throw in the towel. As it is, the failing phone needs to be back to TMO by the middle of next week, so I'm all but out of time to resolve this.

Drake Maijstral said:
I recently picked up a D851 (TMobile). I rooted it, but did not replace the ROM or install a custom bootloader.
Last weekend, the phone started randomly rebooting. Watching logcat via adb showed me several random apps throwing sig11s, after which the phone would give up and reboot. Cycle repeats.
This looks like a hardware issue, as the apps that crash change on each boot cycle.
I arranged with TMobile to swap the device, but they cautioned me that the phone must be returned to an unrooted state.
I've had a hell of a time with it from here. My first try was to install the LG drivers and the PC Suite under a Windows VM, as I do not run Windows at home. Enabling USB passthrough for the phone to the VM let Windows see the phone, but the LG drivers would invariably fail with 'Device cannot start. Code 10.'. Likewise, the PC Suite couldn't find the phone.
Next step was to throw together some spare hw and install Windows 7 on that (a desparate move, to be certain. ). The LG drivers can now recognize the phone, so that's a definite plus. The LG PC Suite, though, claimed that my phone could not be upgraded. Wonderful.
Next step was to try this tutorial: http://www.androidrootz.com/2014/07/how-to-unroot-lg-g3-all-variants.html . I was able to get further with this method, but as it begins to flash SYSTEM, it pauses, and then dies with 'We can't communicate with Phone'. End result - I now have a soft bricked phone. On the phone, I see the port - COM41 - appear, and the usb animation starts to spin ... and after a few seconds, stops. It's at this point that Flashtool throws the Can't Connect error.
I next tried following this tutorial: http://forum.xda-developers.com/showthread.php?t=2785089 to flash a KDZ. The newer LG Flash tool used here can't create a connection to my phone for flashing.
I've run into a wall here. Any ideas on where to go next? I need to reset this phone back to a working stock state so that I can send it back.
Click to expand...
Click to collapse
There is a link in the general thread on how to return to stock including a method using twrp. It's a sticky thread at the top I've never done the twrp method myself but it can more than likely be done without a computer. Twrp can be installed via Playstore if you don't already have it

BACARDILIMON said:
httx://lgg3root.com/lg-g3-root/how-to-unrootunbrick-lg-g3/
Use this and follow video carefully. Has worked many times. Use all his links not what you have downloaded.
NOTE 4
Click to expand...
Click to collapse
Holy hell. That site's links are absolutely infuriating. Anyone who puts each and every download link for software referenced by a howto behind separate timed appearance links that you have to ALSO enter an annoying captcha to enable should be shot out of a cannon - or, at the very least, have their howto ignored by the rest of the world.
Suffice it to say, the quality of that page doesn't give me much confidence that this will work any better than what I've tried already. Since I've already wasted a crapload of time on this project, and more on following those damned links, I'll give it a try tonight, but I'm not going to hold my breath.
Is the author of that page an XDA member? If so, please let me know who he is, so I can berate him personally. Thanks.

Toneman07 said:
There is a link in the general thread on how to return to stock including a method using twrp. It's a sticky thread at the top I've never done the twrp method myself but it can more than likely be done without a computer. Twrp can be installed via Playstore if you don't already have it
Click to expand...
Click to collapse
I'd consider doing that, except as I mentioned, the G3 in question disconnected during a run of Flashtool, rendering it without a working OS to boot to. The phone now boots straight to download mode. The good news is, it's now officially unrooted. The bad news is, it's also officially bricked until I can get an OS flash to work.

Drake Maijstral said:
Holy hell. That site's links are absolutely infuriating. Anyone who puts each and every download link for software referenced by a howto behind separate timed appearance links that you have to ALSO enter an annoying captcha to enable should be shot out of a cannon - or, at the very least, have their howto ignored by the rest of the world.
Suffice it to say, the quality of that page doesn't give me much confidence that this will work any better than what I've tried already. Since I've already wasted a crapload of time on this project, and more on following those damned links, I'll give it a try tonight, but I'm not going to hold my breath.
Is the author of that page an XDA member? If so, please let me know who he is, so I can berate him personally. Thanks.
Click to expand...
Click to collapse
OK I gonna keep it real with you. You can either enter the captcha and fix the issue or throw the phone away. Yes he is a member and for every phone that is out their he has its own page doing this for us. If you can't fix your phone with his method then it not the method but you. I have used this for many bricks. It works and it works great. Sorry if he making you do a little typing but like I said u can use his method or keep trying the other methods. Good luck
NOTE 4

BACARDILIMON said:
OK I gonna keep it real with you. You can either enter the captcha and fix the issue or throw the phone away. Yes he is a member and for every phone that is out their he has its own page doing this for us. If you can't fix your phone with his method then it not the method but you. I have used this for many bricks. It works and it works great. Sorry if he making you do a little typing but like I said u can use his method or keep trying the other methods. Good luck
NOTE 4
Click to expand...
Click to collapse
After going through the painful process of clicking his links, I found that everything I downloaded is the same thing I already had, except for Flashtool - lgg3root's is actually older. Even the TMO firmware for my phone and the dll are both exactly the same, and I checked by running md5sum on them.
But hey, it must be me. There's clearly no other technology-related cause for this issue. I obviously don't know how to follow a howto, right?
Thanks for 'keeping it real'.

Drake Maijstral said:
After going through the painful process of clicking his links, I found that everything I downloaded is the same thing I already had, except for Flashtool - lgg3root's is actually older. Even the TMO firmware for my phone and the dll are both exactly the same, and I checked by running md5sum on them.
But hey, it must be me. There's clearly no other technology-related cause for this issue. I obviously don't know how to follow a howto, right?
Thanks for 'keeping it real'.
Click to expand...
Click to collapse
See we agree.
NOTE 4

BACARDILIMON said:
See we agree.
NOTE 4
Click to expand...
Click to collapse
Not likely.
In any case, it failed again. The video he did gave me the exact same steps I followed elsewhere, and unsurprisingly, it failed with 'We can't communicate with Phone', after beginning the flash process. There is something else wrong here, though I'm not certain if the failing phone is at fault or the PC in question is causing the issue. To be crystal clear, the flash process starts, and then, at a random point during the flash, it completely stops, and Flashtool eventually gives up and throws the aforementioned error.
Any other ideas? If not, I'm going to have to try another PC to rule that out as the culprit. Sigh.

Mine gave the same error as well as couldn't communicate with server but the flash process continued running and the phone rebooted took about 3 minutes u learned not to touch any of the popups on the screen during flash and sorry I missed the part about no OS I thought you were booting to recovery... Driving while reading not the best idea

Toneman07 said:
Mine gave the same error as well as couldn't communicate with server but the flash process continued running and the phone rebooted took about 3 minutes u learned not to touch any of the popups on the screen during flash and sorry I missed the part about no OS I thought you were booting to recovery... Driving while reading not the best idea
Click to expand...
Click to collapse
Nope, the phone is definitely not doing anything - the usb animation on the G3 completely stops before Flashtool throws the error.
And damnit, quit reading while driving. You can do that later.

Moved the hdd Windows is installed on to another PC with a different chipset. After it updated drivers, I tried again. Flash proceeded partway, then died. Reset phone, Flashtool reststarted flash from scratch, flash died at 15%.
15% is interesting. While I've seen the flash die at various points, 15% is the one that was most often repeated. This tells me the failure follows the phone, not the PC - which makes sense, as the phone has a suspected RAM failure.
At this point, it appears that flashing this phone is impossible due to faulty hw. Hopefully TMO (and eventually, LG) will accept the faulty phone back with no OS, because there's no way an OS is being written to this device ever again.

Thank you for answering

yanowman said:
Thank you for answering
Click to expand...
Click to collapse
No problem. There's nothing I hate more than stumbling across a thread where the OP has the same problem I have, only to find it was never updated with the solution.

Good luck man let us know what tmobile says

Google loging loop bricked my G4

hope someone can help me. have unlocked my bootloader and did an update kdz i did a hardreset and now when i boot up my phone it says
THIS DEVICE WAS RESET. TO CONTYNUE SIGN IN WITH A GOOGLE ACCOUNT THAT WAS PREVIOUSLY SYNCED ON THIS DEVICE.
i put my email address in and password and it just take me back to the wifi screen it just keeps looping back like this, ive read this in a new thing with android 5.1 and after 72 hours i can login but its been like 4 days now and still cant use my g4 is there anything i can do to get my phone working again.
any help would be great

Try to connect to different wifi if then your phone will sync with google account.

its been almost aweek now with out my g4 still cant get past this tried kdz updates 10b 10c and still no joy can anyone help sort this

gavo84 said:
its been almost aweek now with out my g4 still cant get past this tried kdz updates 10b 10c and still no joy can anyone help sort this
Click to expand...
Click to collapse
Call in for a replacement.
BAD ASS NOTE 4 & LG G4

ive gone and unlocked the bootloader

gavo84 said:
ive gone and unlocked the bootloader
Click to expand...
Click to collapse
...?

gavo84 said:
ive gone and unlocked the bootloader
Click to expand...
Click to collapse
So you probably unlocked it to be used on other carriers as only the H815 can have an unlocked bootloader.

Just a small sugestion. Have you tried to create a new google account and sync with it to see what happens?

tried that and just tried it again with new account still in a loop. i unlocked the bootloader for root now when u unlock the boot loader lg remove warranty

anyone out there that can help.

https://youtu.be/ukE0mA7yFIM

Did you try clearing cache all google related apps like google service framework ?

what i have done is hardreset not sure how i can clean cache all google related apps like google service framework, as thats the only screen i can see i posted a video of whats happening, i have been on the pgone to google then its not them ring lg, i spoke to lg and emailed them a video waiting for a call back off them.

Maybe try booting into recovery in order to wipe EVERYTHING (and I mean everything possible).
Then boot back into download mode and flash the STOCK .kdz file (the one that your phone came from your carrier with, 10a/b which it was depending on how long you have had your phone).
If that does not work maybe try to build or get a custom AOSP Rom that does not have the GAPPS and see if you can just by-pass the issue all together by booting with having to deal with google apps (you would still need a work around for getting Gapps to work, but at least you would know exactly what the problem is and could boot into a working phone in the mean time).

Weird. Might be that 72 hour sign in feature (cough* bug *cough) thing because it looks like it might be kicking it back on the server side.
1) Did you try signing in on mobile data?
2) Do you have a nandroid, TB, or LG backup that you can restore?
2) Try bypassing the setup screen (keep tapping Next or Skip) and just get to the home screen. Then goto Settings ---> Accounts and add your account. This way you can get a usable device.

ive tried STOCK .kdz 10a/10b/10c
i dont have a nand backup
ive tryed using other wifi and my mobile internet.
google say its not them and im still waiting for lg to even look at the video they asked for..
is there any roms even out there for the g4 i cant find any. over a week now with out my g4.
AOSP Rom i wouldnt know where to start on building one i no longer have root or TWRP after flashing kdz
cant get the phone in adb mode developer as i cant get past the wifi screen as seen in video and cant get USB debugging.

gavo84 said:
hope someone can help me. have unlocked my bootloader and did an update kdz i did a hardreset and now when i boot up my phone it says
THIS DEVICE WAS RESET. TO CONTYNUE SIGN IN WITH A GOOGLE ACCOUNT THAT WAS PREVIOUSLY SYNCED ON THIS DEVICE.
i put my email address in and password and it just take me back to the wifi screen it just keeps looping back like this, ive read this in a new thing with android 5.1 and after 72 hours i can login but its been like 4 days now and still cant use my g4 is there anything i can do to get my phone working again.
any help would be great
Click to expand...
Click to collapse
Did you buy phone new, from where?

the phone is on a 24 month contract from o2 i got the phone from the carphone warehouse

ive just got off the phone to LG still not looked at the video they asked for i have been told to wait 7 working days WHAT thats gonna be like two weeks with a none working phone.

Weird, it's like you got a refurbished phone, and the old google account was not removed the correct way (remove google account before the phone is reset). If you reset phone without removing your account you get exactly what has happened to your phone. I see it all the time on the Nexus 6 forum.

SOLVED [HELP] LG G4 (H815P) Bricked "Authentication Fail #9"

Hello everyone
So, this is my problem here, I got my G4 last week, rooted it to debloat, followed the instructions I found here on XDA, and it was working as a charm.
The problem came when I wanted to change the (micro) SD card to another phone, I took the back cover off, took out the SD card, and a warning message about the SD card might be damaged came on screen.
So I turned off the G4, after I was ready to put back the SD, tried to power on the phone again and the error message appeared.
"Security Error, Auth Fail #9" and then it just won't boot.
Hope anyone can help me.
I was on stock Telcel Firmware, had rebooted the phone several times before with no issues so far.

Never mind, I just reflashed stock firmware found
here: http://devtester.ro/projects/lg-firmwares/
then followed this steps
Tutorial: http://devtester.ro/projects/lg-firmwares/install.php
So, after a clean flash, it booted again, as Iv'e had it for just one week, nothing was lost.
Hope this helps anyone else facing this strange problem.
By the way, if anyone know something about the possible cause for this malfunction, I woud really appreciate you sharing info.
Cheers!

i Have had the same problem i was woundering if you could please walk me through the steps on how you fixed yours.
I recently just bought a new LG G Stylo with MetroPCS. this is my first time being with android so i took it upon my self to root the phone and see what all i could do with it. Everything worked fine for a couple of days then i tried to reset my phone and when it tried to come back on the lg logo cane up and it said Authentication fail #9. I try to factory reset the phone but it goes back to the same screen. I can not put the phone in download mode and my computer does not detect that there is a phone there. If there is anyone who can help me please it will be greatly appreciated.

joyousfrank said:
Never mind, I just reflashed stock firmware found
here: http://devtester.ro/projects/lg-firmwares/
then followed this steps
Tutorial: http://devtester.ro/projects/lg-firmwares/install.php
So, after a clean flash, it booted again, as Iv'e had it for just one week, nothing was lost.
Hope this helps anyone else facing this strange problem.
By the way, if anyone know something about the possible cause for this malfunction, I woud really appreciate you sharing info.
Cheers!
Click to expand...
Click to collapse
How can be LG G4 H815P be rooted, have read many tutorials, but no one is for the variant "P" (Telcel).
Thanks!!!

Hello!
Well, I found out the source of the problem on "error 9".
As it happened again a couple days after posting the thread.
In my case, when I uninstalled LG apps, such as music and video apks, "error 9" would come up on next boot.
Follow the tutorials, the most important thing is to have the right version of SW to your phone.
Also, I had to download LG bridge, then a pop-up came telling that drivers for the phone should be updated, I just accepted the update and then my phone was detected on my PC .
If you encounter a problem, please provide me a little more info (with caps if possible).
Hope to help you.
Enviado desde mi LG-H815P

@joyousfrank. I've just been de-bloating my phone and managed to get a Security Error problem and was hoping to use this method to get the thing live again. Trouble is that Google is blocking the LGFlashtool download link. Any chance you have another link or could maybe upload a copy of the tool somewhere? Cheers

joyousfrank said:
Hello!
Well, I found out the source of the problem on "error 9".
As it happened again a couple days after posting the thread.
In my case, when I uninstalled LG apps, such as music and video apks, "error 9" would come up on next boot.
Follow the tutorials, the most important thing is to have the right version of SW to your phone.
Enviado desde mi LG-H815P
Click to expand...
Click to collapse
Hi, my version of the G4 is H815P too (CLARO BR), and I want to know wich tutorials you're referring to and if you encounter a method to surpass this issue when trying to remove/debloat the phone...

wadken1 said:
@joyousfrank. I've just been de-bloating my phone and managed to get a Security Error problem and was hoping to use this method to get the thing live again. Trouble is that Google is blocking the LGFlashtool download link. Any chance you have another link or could maybe upload a copy of the tool somewhere? Cheers
Click to expand...
Click to collapse
Sorry I couldn't help you, but it's great to know that you have solved your problem.

depechemodem said:
How can be LG G4 H815P be rooted, have read many tutorials, but no one is for the variant "P" (Telcel).
Thanks!!!
Click to expand...
Click to collapse
I used this thread as a guide
http://forum.xda-developers.com/g4/orig-development/root-tmo-vzw-intl-variants-soon-root-lg-t3164765
(Follow the steps for International H815 10c Version)
This is the rooted image I used http://forum.xda-developers.com/g4/...on-root-lg-t3164765/post62251256#post62251256
After you download it just unzip it, and rename the .img file to "system.rooted.H81510c-EU"
The file must be system.rooted.H81510c-EU.img
Hope to help.
Cheers!

hralm said:
Hi, my version of the G4 is H815P too (CLARO BR), and I want to know wich tutorials you're referring to and if you encounter a method to surpass this issue when trying to remove/debloat the phone...
Click to expand...
Click to collapse
Hello!
The first thing to do, is to find the right SW foy your phone model (and carrier) as I read some problems when flashing other different than stock.
Look up here http://devtester.ro/projects/lg-firmwares/download.php there's where I found the SW for Telcel. Just input your IMEI on that page and it will give you a download link.
Then, follow this steps http://devtester.ro/projects/lg-firmwares/install.php
It's important to tell you that my phone wasn't detected by my PC until I downloaded LG Bridge as it comes with the latest drivers, so I recommend you to do this if you face the "not-detecting phone PC".
And for last, I suppose that there should be thread with a list of safe to uninstall apps (this is my first LG so not totally sure).
As there's enough room for apps on the phone, I just ended freezing annoying apps with Link2SD to avoid having the "Authentcation Error #9" problem.
Hope to help you, cheers!

FLASHGOTHOPS said:
i Have had the same problem i was woundering if you could please walk me through the steps on how you fixed yours.
I recently just bought a new LG G Stylo with MetroPCS. this is my first time being with android so i took it upon my self to root the phone and see what all i could do with it. Everything worked fine for a couple of days then i tried to reset my phone and when it tried to come back on the lg logo cane up and it said Authentication fail #9. I try to factory reset the phone but it goes back to the same screen. I can not put the phone in download mode and my computer does not detect that there is a phone there. If there is anyone who can help me please it will be greatly appreciated.
Click to expand...
Click to collapse
Hope it's not too late.
The first thing to do, is to find the right SW foy your phone model (and carrier) as I read some problems when flashing other different than stock. (This is important as I've only done this with G4, so you're going to do the search for the right SW)
You can look up here http://devtester.ro/projects/lg-firmwares/download.php there's where I found the SW for H815P (Telcel). Just input your IMEI on that page and hopely it will give you a download link.
Then, follow this steps http://devtester.ro/projects/lg-firmwares/install.php
It's important to tell you that my phone wasn't detected by my PC until I downloaded LG Bridge as it comes with the latest drivers, so I recommend you to do this if you face the "not-detecting phone PC".
Cheers!

IIIIII'm stuck!

Long story short - Bought an LG D851 off Swappe. It came with CM13. I've been sticking nightlies on it. Currently on 2/14. I tried to put 2/18 and found that TWRP wasn't working - it hangs on TWRP Splace. Then I noticed SuperSU wasn't on the phone. So I installed it. Can't update the binaries. Looks like I don't have root.
Used LG Flash tool and flashed D85120E_00.kdz. Part way through, I get an error that the software cannot communicate with the server and it asks if I want to abort. I let it continue.
The phone reboots, I get the "Android is updating 1/196", etc. After which, it reboots, I get the boot jingle, and then it holds on the T-Mobile screen. I've tried flashing the KDZ a few times with the same result.
So now, I humbly, yet again, ask for help.
The endgoal here, is to have a working ROM with BT and WiFi working. I really don't care what it is at this point. Marshmallow is nice. Lollipop is okay. Whatever. I just need a working phone.
Thanks in advance, as always.

mdphoenix said:
Long story short - Bought an LG D851 off Swappe. It came with CM13. I've been sticking nightlies on it. Currently on 2/14. I tried to put 2/18 and found that TWRP wasn't working - it hangs on TWRP Splace. Then I noticed SuperSU wasn't on the phone. So I installed it. Can't update the binaries. Looks like I don't have root.
Used LG Flash tool and flashed D85120E_00.kdz. Part way through, I get an error that the software cannot communicate with the server and it asks if I want to abort. I let it continue.
The phone reboots, I get the "Android is updating 1/196", etc. After which, it reboots, I get the boot jingle, and then it holds on the T-Mobile screen. I've tried flashing the KDZ a few times with the same result.
So now, I humbly, yet again, ask for help.
The endgoal here, is to have a working ROM with BT and WiFi working. I really don't care what it is at this point. Marshmallow is nice. Lollipop is okay. Whatever. I just need a working phone.
Thanks in advance, as always.
Click to expand...
Click to collapse
Ouch!!! Read my CM13 post...you don't need SuperSU anymore (CM13 has root built in)--I had the same problem a while back--fixed it by flashing the old factory version on the phone & then used Purple Drake to root it & then installed CM13...Was a HARD lesson for me.
Upshot---No SuperSU needed--No BusyBox needed on CM13. If you are used to the old way of doing things--you'll get B0rked big time.
Luck to you!!!!

debianmain1 said:
Ouch!!! Read my CM13 post...you don't need SuperSU anymore (CM13 has root built in)--I had the same problem a while back--fixed it by flashing the old factory version on the phone & then used Purple Drake to root it & then installed CM13...Was a HARD lesson for me.
Upshot---No SuperSU needed--No BusyBox needed on CM13. If you are used to the old way of doing things--you'll get B0rked big time.
Luck to you!!!!
Click to expand...
Click to collapse
I guess trying to push the SuperSU binaries is what effed up TWRP?
I'll check out your CM13 post. But the issue I have is that I can't flash a factory version with LG Flash Utility. I mean, it does, but now it just sits on the Tmobile splash.
Hopefully your post will show me something I missing.
@debianmain1 is this the post you're talking about? http://forum.xda-developers.com/showpost.php?p=65432245&postcount=158
I tried that DD command to no avail last night. I tried everything I could find before reaching out to everyone for help.

mdphoenix said:
I guess trying to push the SuperSU binaries is what effed up TWRP?
I'll check out your CM13 post. But the issue I have is that I can't flash a factory version with LG Flash Utility. I mean, it does, but now it just sits on the Tmobile splash.
Hopefully your post will show me something I missing.
@debianmain1 is this the post you're talking about? http://forum.xda-developers.com/showpost.php?p=65432245&postcount=158
I tried that DD command to no avail last night. I tried everything I could find before reaching out to everyone for help.
Click to expand...
Click to collapse
Yes--the SuperSU binaries B0rked my install real good ( as I understand it--2 different types of SU installed B0rks everything )..... And with CM13, you have to allow ADB & apps to have root. I've been modding phones for years now & CM13 threw me under the bus until I learned what to do... I use to ALWAYS root, install BusyBox & SuperSU---not with CM13
Ya--that won't help you I'd look up fastboot commands & try to flash it that way--sounds like you are stuck in a startup bootloop. I did see some info online about starting the G3 in fastboot--I had a very hard time getting my G3 fixed. Do you have a Linux computer to use? It's easier to work with some of the diag stuff with Linux.

debianmain1 said:
Yes--the SuperSU binaries B0rked my install real good ( as I understand it--2 different types of SU installed B0rks everything )..... And with CM13, you have to allow ADB & apps to have root. I've been modding phones for years now & CM13 threw me under the bus until I learned what to do... I use to ALWAYS root, install BusyBox & SuperSU---not with CM13
Ya--that won't help you I'd look up fastboot commands & try to flash it that way--sounds like you are stuck in a startup bootloop. I did see some info online about starting the G3 in fastboot--I had a very hard time getting my G3 fixed. Do you have a Linux computer to use? It's easier to work with some of the diag stuff with Linux.
Click to expand...
Click to collapse
I can always fire up an Ubuntu flash drive if necessary. I'll get working on Fastboot.
Thanks again!
@debianmain1 Hmmm, Fastboot doesn't seem to be functional. I've got download mode. Can I push something to it that way?

I managed to get somewhere yesterday. I tried flashing D85120e_00.kdz and it failed again. I got the "cannot communicate with server" error, then it rebooted and tried running initial setup and failed.
So I tried flashing D85110C_00.kdz. Much to my surprise, it worked! So I ran through initial setup and got the phone working to make sure all was well. I rebooted and got the Red 2. So now here I am. Guides show that I should be able to put it in download mode and reload factory firmware again. But all I get is the "Download Mode" graphic. It never switches over to the updating mode with the circular arrows. I fear the worst at this point, but I really don't know enough about the LGs to diagnose my own doom just yet.

Someone on Reddit pointed me in the direction of Board Diag. Unfortunately it doesn't appear to work on D851. Running out of options. Looks like it'll end up being an expensive learning experience.

Rootkit on LG G4. Takes over my network and can't remove it.

So last month I was following a tutorial on how to install ManageIQ. One of the steps involved pasting someone elses JSON on my google cloud account. That part of the tutorial was now changed with "generate your own private key".
Well, next thing I know my entire network got hacked, every single device too, my gmail account completely stolen, all passwords included etc. I didnt know that pasting someone elses Json key was basically giving access of everything to someone else.
The LG G4 was infected with some kind of malicious **** that as soon as I turn it on and connect it to my network, it opens my network to everyone.
The problem is ; I cant remove the rootkit because I cant root the phone. When I try to do it, I get a "this phone is from singapore and cant be unlocked" (?) message on he LG page, even tho its an International LG G4 H815 and shouldnt have this problem.
Yes, I already made several factory resets and using both methods (volume key down and by just doing it through the Opions menu), already tried with a brand new google account after one of these resets but still nothing. Same results. Today was ver obvious that the my phone was one of the issues because everything on my network was working fine until I decided to turn the g4 on after like 2 weeks..I wanted to check whatsapp.. And then I started to see random processes on my PC, ipsec, ssh enabled on my router, people getting access to the webcams of all devices (Im not joking) and all the nightmarish stuff Ive been suffering all this time. It came back once again.
One thing I noticed is that theres a ton of credentials that looks weird. Could someone with a clean lg g4 upload pictures of their credentials page on their phone? Also I cant remove all credentials because its greyed out.
Will upload screenshots of my credentials, later, so you can see and maybe tell me if something looks shady.
Solutions? Thanks.
EDIT: Here are all the credentials I got:
imgur . com / a / lA66Z
It gives me the option to encrypt and sd i dont have, altho I read this is a common issue.
I didnt take direct screenshots because im scared of plugging this into my PC right now so I just took photos. These pictures were taken right after a factory reset (low volume key method), just now.

Have you tried this?
https://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848

dsip said:
Have you tried this?
https://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
Click to expand...
Click to collapse
Interesting. Would this work on a H815 with android 6.0?

dsip said:
Have you tried this?
https://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
Click to expand...
Click to collapse
Ok, installed using LGUP, refurbish option.
The certificates are still there tho.
Can I assume my phone is safe now ?

same problem

genjumain said:
Ok, installed using LGUP, refurbish option.
The certificates are still there tho.
Can I assume my phone is safe now ?
Click to expand...
Click to collapse
No security expert here, nor programmer, just a reader of these forums. But it seems pretty unlikely to me that you would have caught something that gets so deep into the system that it's still there after an lgup flash.
I have a bunch of things (about 40, maybe?) in the trusted credentials, too, so I guess that's normal?

genjumain said:
Ok, installed using LGUP, refurbish option.
The certificates are still there tho.
Can I assume my phone is safe now ?
Click to expand...
Click to collapse
After flashing the kdz your phone is clean if it was infected but! if you restore apps you may get infected again (IF it was a smartphone virus).
The trusted certificate authorities in your screens looking fine and the reason why you cannot remove them is they are coming with the android OS.
Your main problem seems to me your PC or PCs . I would run an offline antivirus scan with a boot ISO. I would do it in 2 steps. Step 1 would be to run the AV boot ISO scan on your system partitions only to see if it find anything. Do this with different scanners is highly recommended!!
If you found something I recommend to reinstall the OS! Cleaning is no 100% choice.
You should download at least 2 (3 are the top most I would use) of the free boot ISOs:
https://www.raymond.cc/blog/13-anti...-compared-in-search-for-the-best-rescue-disk/
You can make your life easier when using a method to make multiple boot ISOs e.g. on one USB stick:
https://www.raymond.cc/blog/integra...ne-single-disc-or-usb-flash-drive-with-sardu/
If you really do not want to reinstall your OS the next step is to scan ALL your data as well.
To be honest the above can be a VERY time consuming process and there will be still a risk that not every virus can be caught. The only chance to be clean is reinstall the OS of your PC. I assume it is windows so it may be the time to think about installing Linux instead the security concept of Linux is different to windows and keep in mind that 95% of viruses target windows systems.
.
Sent from my LG-H815 using XDA Labs