Database Users

[GUIDE] LG G STYLO How to root the T-Mobile 6.0 update

This guide was made before Kingroot was able to root the official update. But thanks to @oskar and @TheDerekHarper on XDA and to @josephwv on Android forums it is now comfirmed that Kingroot will root the official update. But first you must still follow steps #1 through #6 so Kingroot can root your device.
Now before Kingroot was able to root the update I figured out how to root the official update and it is not all to complicated. The following guide will walk you through the root process. But I am not responsible for anything that happens to your devices by using this guide as you are responsible for your device.
What you need:
1. A computer running Linux or Windows with adb and fastboot installed. (I used Ubuntu)
2. If you are using Windows you need all the drivers for your device installed. Linux users will not have to worry about this.
3. A functioning USB cable for your device.
4. Battery charged at least 50% just for safety.
5. The TWRP revovery.img, this is the same TWRP recovery we already have for the LG G Stylo I have just renamed it to recovery.img to make it easier to type the name in while typing fastboot commands.
6. The SuperSU-v2.65-20151226141550.zip by Chainfire. (All credit to Chainfire for this awesome zip.)
How to root your device:
1. I suggest you first go to Settings/General/About Phone/Software info and tap on the "Build number" until it says"You are now a developer". Then back out of until you are in Settings/General and go to "Developer options" and turn "Enable OEM unlock" on. This is to allow TWRP recovery to be able to boot. Also turn on "USB debugging" while you are there.
2. Download the SuperSU-v2.65-20151226141550.zip to your device. You need to move the zip file from your Downloads folder to somewhere on your external SD card as it will not be deleted from there when you use the "fastboot oem unlock" command in step #6.
3. Download the recovery.img to your computer. If you do not have adb and fastboot setup globally for linux or in your path for windows you need to move the recovery.img to the directory your adb and fastboot is in and open a terminal or command line (depending on your OS) in that directory or cd to that directory. If you do have adb and fastboot globally or in your path you can just open a terminal or command line in the directory you have the recovery.img or cd to the directory you have the recovery.img.
4. Once you have the terminal or command line open run the command "adb devices" to make sure your devices is detected by adb. You may get a toast pop up on your device asking if you to "Allow usb debugging". Except this as this is the RSA key you need to allow your computer to communicate with your device via adb. You should see something like "LGH631dffacad9 device" in your terminal or command line. If you see "unauthorized" instead of "device" you have not excepted the RSA key.
5.Now type the following command in your terminal or command line. Type "adb reboot bootloader". This will reboot your device to fastboot mode. Once in fastboot mode use the "fastboot devices" to make sure your device is recognized by fastboot. You should see something like "dffacad9 fastboot". If you are in Linux and get a error message you may have to use "sudo fastboot devices" for fastboot to work. (If you are using Windows and are having trouble with fastboot recognizing your device you need to install the device drivers. If it still does not work install the drivers again with your device connected to your computer in fastboot mode.)
6. To fully unlock your bootloader you have to use the command "fastboot oem unlock". You have to do this or this root method will not work. But be warned that if you do use this command it will factory reset your device. Plus you will get a line of text saying the bootloader is unlocked on the splash screen when you boot your device.
6-1: If you are wanting to use Kingroot to root your device you can reboot your device now. Open the Kingroot app and let it root your device and then use Flashify, Rashr, or a similar app to flash the recovery. Then boot to recovery and flash the SuperSU.zip in recovery and it will remove Kingroot and have SuperSU installed on your device.
7. Now you can do this two ways if you do not want to keep the stock recovery you can use the command "fastboot flash recovery.img" to install the recovery and then use the command "fastboot reboot recovery" to boot to the TWRP recovery. (If this command gives you issue like it seems to be for many then just use the the following method and then use Flashify or Rashr app to install TWRP after you are done rooting.) If you want to keep the stock recovery you can use the command "fastboot boot recovery.img" to boot to the TWRP recovery.
8. Once you are booted to the TWRP recovery you should make a full backup first so you have a backup to restore to in case things go bad. After you make a backup then select install and then find the SuperSU-v2.65-20151226141550.zip and install it. Once it is installed reboot your device to system. If TWRP gives you a warning about the su binaries missing and asks if you want to install thee su binaries before you reboot select no or it will interfere with the rooting process of the SuperSU.zip. When your device reboots it will boot to the LG splash screen and then reboot again. But then it will boot to the OS but it will take a minute. Make sure you let your device reboot all the way to the lockscreen or home screen depending on if you have a lockscreen enabled or not. You should be fully rooted after this, enjoy.

Resserved in case needed later.

Thank you.

target reported max download size of 268435456 bytes
sending 'recovery' (11300 KB)...
OKAY [ 0.359s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.359s

ok so i know this is 100% my fault for not reading, but why would you even include step 6? it wipes everything including the supersu.zip. the files i'm pissed about, but i can get over. mostly music plus some ****ty pictures. contacts can text me. but the main thing is i had to restart my phone, get it started up and everything, then put the super su.zip back onto the phone. just a tedious task.

Can I use this guide with my G4 Stylus (H635)?

wtf... i get this same error
C:\adb>fastboot flash recovery v10.img
target reported max download size of 268435456 bytes
sending 'recovery' (11230 KB)...
OKAY [ 0.390s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.390s
I've tried multiple versions of the TWRP for the g stylo on adroidforum and none of it flashes with the fastboot flash recovery .....img option. Every single one fails. Please tell me how you flashed the recovery... Also I cant run it through Flashify because my SuperSU says no binary is installed... I'm completely lost at this point

aaron2z said:
wtf... i get this same error
C:\adb>fastboot flash recovery v10.img
target reported max download size of 268435456 bytes
sending 'recovery' (11230 KB)...
OKAY [ 0.390s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.390s
I've tried multiple versions of the TWRP for the g stylo on adroidforum and none of it flashes with the fastboot flash recovery .....img option. Every single one fails. Please tell me how you flashed the recovery... Also I cant run it through Flashify because my SuperSU says no binary is installed... I'm completely lost at this point
Click to expand...
Click to collapse
Someone mentioned using the Kingroot app and I gotta admit, I was skepticle at first but after testing. I can confirm it works.
Just go go KingRoot.net, download their apk, install and run the root program. Igll work out of the box after, sadly I couldn't get the above method to work either with super su.

aaron2z said:
wtf... i get this same error
C:\adb>fastboot flash recovery v10.img
target reported max download size of 268435456 bytes
sending 'recovery' (11230 KB)...
OKAY [ 0.390s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.390s
I've tried multiple versions of the TWRP for the g stylo on adroidforum and none of it flashes with the fastboot flash recovery .....img option. Every single one fails. Please tell me how you flashed the recovery... Also I cant run it through Flashify because my SuperSU says no binary is installed... I'm completely lost at this point
Click to expand...
Click to collapse
do the fastboot boot recovery.img so it boots up twrp then flash the supersu zip then boot your phone you should be rooted then flash twrp using flashify

I was getting the same error, ( in step 7 don't flash the recovery )
just use "fastboot boot recovery.img" and it will boot to TWRP without installing it
you can then install SU, ( note ) when you exit or re boot from TWRP it will say SU in not installed do you want to install it, I did the first time and it seemed to hose up, so I did everything over and the second time selected no to re install.
once booted I used flashify to install the TWRP img, and I am able to boot to recovery using Quickboot apk
on a side note I have SU installed, I can use root explorer and other apps that ask for SU access, but Titanium backup
doesn't seem to uninstall apps anymore, they seem to re install after a reboot
Hope this helps yall's
aaron2z said:
wtf... i get this same error
C:\adb>fastboot flash recovery v10.img
target reported max download size of 268435456 bytes
sending 'recovery' (11230 KB)...
OKAY [ 0.390s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.390s
I've tried multiple versions of the TWRP for the g stylo on adroidforum and none of it flashes with the fastboot flash recovery .....img option. Every single one fails. Please tell me how you flashed the recovery... Also I cant run it through Flashify because my SuperSU says no binary is installed... I'm completely lost at this point
Click to expand...
Click to collapse

TheDerekHarper said:
Someone mentioned using the Kingroot app and I gotta admit, I was skepticle at first but after testing. I can confirm it works.
Just go go KingRoot.net, download their apk, install and run the root program. Igll work out of the box after, sadly I couldn't get the above method to work either with super su.
Click to expand...
Click to collapse
I gotta be honest... I'm pretty skeptical to try it. I've read of everyone having either a softbrick boot loop or the root just not staying after reboot. Yours worked for H631 T-mobile 6.0 and stayed? If you confirm T-mobile variant and 6.0 I'll try it. There's a lot of headache with this method for me (not saying it doesn't work). I bricked my phone trying to get the binary files for SU by trying to reroot. But unbricked it with LG Flash Tools and a stock kdz. So I don't want to brick it again twenty minutes later lol

aaron2z said:
I gotta be honest... I'm pretty skeptical to try it. I've read of everyone having either a softbrick boot loop or the root just not staying after reboot. Yours worked for H631 T-mobile 6.0 and stayed? If you confirm T-mobile variant and 6.0 I'll try it. There's a lot of headache with this method for me (not saying it doesn't work). I bricked my phone trying to get the binary files for SU by trying to reroot. But unbricked it with LG Flash Tools and a stock kdz. So I don't want to brick it again twenty minutes later lol
Click to expand...
Click to collapse
Made a tutorial on how to get the marshmallow update (i.e. rom i've used.)
And then afterwards i downloaded Minimal ADB & Fastboot, OEM Unlocked the device (for safety) and downloaded the Kingroot Apk.
Installed it, and just allowed the program to root. It was pretty simple, haven't had any issues (i've even disabled OEM Unlock from the phone & USB Debugging.)
Hell, even adoptable storage is enabled for my phone too (but that's another tutorial from somewhere else.)
I do plan to make a root video, just so someone could see it and grab their opinion.
To be clear: I'm using a metroPCS LG Stylo. Also, only time the phone had issues was when i factory reset it to get rid of root. (didn't work)
so i had to follow the steps from the above tutorial to reflash the stock rom.

jothe1 said:
do the fastboot boot recovery.img so it boots up twrp then flash the supersu zip then boot your phone you should be rooted then flash twrp using flashify
Click to expand...
Click to collapse
well this did it, the root actually worked.

I got a permanent root from the procedure listed on page one of this thread. The only thing I did differently was, when booted into TWRP and you try to re boot the system you will get the question if you want TWRP to install root. If you do allow TWRP to install root, you wont get root. At this point select the option to just reboot the phone. The LG Logo will appear twice before it fully boots. When the device is fully up, you will have root.

Foamp said:
ok so i know this is 100% my fault for not reading, but why would you even include step 6? it wipes everything including the supersu.zip. the files i'm pissed about, but i can get over. mostly music plus some ****ty pictures. contacts can text me. but the main thing is i had to restart my phone, get it started up and everything, then put the super su.zip back onto the phone. just a tedious task.
Click to expand...
Click to collapse
My apologies as I made a typo in the guide. The correct command is "fastboot flash recovery recovery.img" to flash the recovery. I will fix this along with another rework about putting the SusperSU.zip only on your SD card.
oskar5510 said:
Can I use this guide with my G4 Stylus (H635)?
Click to expand...
Click to collapse
I do not know if you can use it or not as I do not have that device. But you can try it bit if your device does not boot to fastboot mode when you issue the adb reboot bootloader command then your device's bootloader is not unlockable and this root method will not work for you. But from the posts in this thread point out that Kingroot now works on the 6.0 update so you can also try Kingroot to see if it willroot your device.
aaron2z said:
wtf... i get this same error
C:\adb>fastboot flash recovery v10.img
target reported max download size of 268435456 bytes
sending 'recovery' (11230 KB)...
OKAY [ 0.390s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.390s
I've tried multiple versions of the TWRP for the g stylo on adroidforum and none of it flashes with the fastboot flash recovery .....img option. Every single one fails. Please tell me how you flashed the recovery... Also I cant run it through Flashify because my SuperSU says no binary is installed... I'm completely lost at this point
Click to expand...
Click to collapse
Again sorry as this is fully my fault for making the typo on the fastboot command to flash recovery. I am fixing it as soon as I am done with this post.
TheDerekHarper said:
Someone mentioned using the Kingroot app and I gotta admit, I was skepticle at first but after testing. I can confirm it works.
Just go go KingRoot.net, download their apk, install and run the root program. Igll work out of the box after, sadly I couldn't get the above method to work either with super su.
Click to expand...
Click to collapse
Thank you for posting this.
jothe1 said:
do the fastboot boot recovery.img so it boots up twrp then flash the supersu zip then boot your phone you should be rooted then flash twrp using flashify
Click to expand...
Click to collapse
Yes this is how I did it when I rooted my device. I will edit the guide some to point this out.
AgainstTheFlow said:
I got a permanent root from the procedure listed on page one of this thread. The only thing I did differently was, when booted into TWRP and you try to re boot the system you will get the question if you want TWRP to install root. If you do allow TWRP to install root, you wont get root. At this point select the option to just reboot the phone. The LG Logo will appear twice before it fully boots. When the device is fully up, you will have root.
Click to expand...
Click to collapse
Thank you for posting this so others can see this does work.
infektedpc said:
target reported max download size of 268435456 bytes
sending 'recovery' (11300 KB)...
OKAY [ 0.359s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.359s
Click to expand...
Click to collapse
I also apologize to you for my mistake. It will be corrected shortly.
TheDerekHarper said:
Made a tutorial on how to get the marshmallow update (i.e. rom i've used.)
And then afterwards i downloaded Minimal ADB & Fastboot, OEM Unlocked the device (for safety) and downloaded the Kingroot Apk.
Installed it, and just allowed the program to root. It was pretty simple, haven't had any issues (i've even disabled OEM Unlock from the phone & USB Debugging.)
Hell, even adoptable storage is enabled for my phone too (but that's another tutorial from somewhere else.)
I do plan to make a root video, just so someone could see it and grab their opinion.
To be clear: I'm using a metroPCS LG Stylo. Also, only time the phone had issues was when i factory reset it to get rid of root. (didn't work)
so i had to follow the steps from the above tutorial to reflash the stock rom.
Click to expand...
Click to collapse
Thanks for posting this I will add this to the post as another option to root seeing as it is comfirmed. I will give credit to you and @oskar for this info.

Is there anyway to do this without wiping your data from 'fastboot oem unlock'? My bootloader keeps saying locked in fastboot mode even though I checked Enable OEM Unlock in settings. It won't let me boot the recovery.img because it's locked.

supersonic125 said:
Is there anyway to do this without wiping your data from 'fastboot oem unlock'? My bootloader keeps saying locked in fastboot mode even though I checked Enable OEM Unlock in settings. It won't let me boot the recovery.img because it's locked.
Click to expand...
Click to collapse
Are you trying to use the fastboot boot recovery.img command?

Yeah, if I try to flash instead of booting I get:
C:\adb>fastboot flash recovery recovery.img
target reported max download size of 268435456 bytes
sending 'recovery' (11300 KB)...
OKAY [ 0.380s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.401s

supersonic125 said:
Yeah, if I try to flash instead of booting I get:
C:\adb>fastboot flash recovery recovery.img
target reported max download size of 268435456 bytes
sending 'recovery' (11300 KB)...
OKAY [ 0.380s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.401s
Click to expand...
Click to collapse
Hmmm looks like maybe fully unlocking the bootloader enables all fastboot commands. You can try downloading and installing Kingroot and root with it as the posts here comfirm it will root the update now. Or just u lock the bootloaderb but your device will be reset if you do.

T-Macgnolia said:
Hmmm looks like maybe fully unlocking the bootloader enables all fastboot commands. You can try downloading and installing Kingroot and root with it as the posts here comfirm it will root the update now. Or just u lock the bootloaderb but your device will be reset if you do.
Click to expand...
Click to collapse
What if we just enable oem unlock in both the system and the bootloader then use adb to push the recovery, superuser, and busybox to the system. King Root caused too many system instabilities, it had injected itself as a system app and after unrooting and uninstalling after a reboot I was left with a soft brick due to a secure boot error 1003. A stock 5.1.1 kdz and the lg flash tool was able to bring my Stylo back to life.
It could all be done by running a simple batch file bundled with everything we need for our device. Linux would probably be the better option but it could work the same in windows.

bought a oneplus 2 with 3.6.1 OOS and cant flash twrp to recovery part

newbie to a oneplus 2. I acquired this phone locked and with OOS 3.61. been doing some searches but apparantly not enough and not getting very far.
Actions performed so far
set oem unlocking in dev-options to enabled.
rebooted to fastboot
"fastboot oem unlock" was succesful and rebooted and completed setup
rebooted to fastboot
from fastboot installed twrp "fastboot flash recovery recovery.img" (recovery.img being twrp-3.2.1-0-oneplus2.img)
results:
C:\platform-tools>fastboot flash recovery recovery.img
target reported max download size of 536870912 bytes
sending 'recovery' (22180 KB)...
OKAY [ 0.624s]
writing 'recovery'...
OKAY [ 1.310s]
finished. total time: 1.934s
:end results
then boot directely to twrp with "fastboot boot recovery.img"
performed nandroid backup.
rebooted device and tried booting to recovery but still has oem recovery.
any ideas? would like twrp native not via fastboot only.
thanks in advance.
Update solved:
booted twrp from .img file and installed su.zip and installed twrp.apk and used the app to install twrp. works now. not sure why it was saying it was working from from fastboot and writing but hope this helps someone else.

TWRP 3.2.1 doesn't work properly yet on the OnePlus 2 for some reason. I can assume that you wanted root so I can give you 2 options:
1) If you want to stay on stock OxygenOS 3.6.1 or a custom rom Nougat or lower, then flash TWRP 3.1.1
2) If you want to have an Oreo rom, then you have to get your hands on the unofficial TWRP from anupritaisno1. The download link for that on his forum doesn't work so if you want, I can link my Google Drive.

This is my first time trying to root my android and I am having the same problem with my oneplus 2 3.6.1 OOS. I have successfully unlocked oem but can't seem to flash twrp.
I have downloaded twrp 3.2.1 on my desktop and renamed it to "recovery".
I used the same command "fastboot flash recovery recovery.img" but it just says "error: cannot open 'recovery.img' "
Can you please tell me how you managed to install twrp and root your android?

you need to downgrade the OOS to ver 3.002 or 3.1, then you re-unlock the bootloader then flash twrp recovery.
Finally flash your phone with root of your liking.

rp201 said:
newbie to a oneplus 2. I acquired this phone locked and with OOS 3.61. been doing some searches but apparantly not enough and not getting very far.
Actions performed so far
set oem unlocking in dev-options to enabled.
rebooted to fastboot
"fastboot oem unlock" was succesful and rebooted and completed setup
rebooted to fastboot
from fastboot installed twrp "fastboot flash recovery recovery.img" (recovery.img being twrp-3.2.1-0-oneplus2.img)
results:
C:\platform-tools>fastboot flash recovery recovery.img
target reported max download size of 536870912 bytes
sending 'recovery' (22180 KB)...
OKAY [ 0.624s]
writing 'recovery'...
OKAY [ 1.310s]
finished. total time: 1.934s
:end results
then boot directely to twrp with "fastboot boot recovery.img"
performed nandroid backup.
rebooted device and tried booting to recovery but still has oem recovery.
any ideas? would like twrp native not via fastboot only.
thanks in advance.
Update solved:
booted twrp from .img file and installed su.zip and installed twrp.apk and used the app to install twrp. works now. not sure why it was saying it was working from from fastboot and writing but hope this helps someone else.
Click to expand...
Click to collapse
dear,
do you mind sharing the twrp.img you used?
Thank you

Unlocked OnePlus 6T stuck in bootloader

Hello, my OnePlus 6T is stuck in fastboot mode, I'd like to install Oxygen OS (which I have the zip file on my PC) or install twrp on it in order to flash the OOS but here is the problem:
If I type the command fastboot devices, the phone is detected:
PS C:\Users\Geoffrey\Desktop\OP6T\twrp> fastboot devices
4872f361 fastboot
BUT, if I type fastboot boot twrp.img (with a command prompt in the folder of the file), I get this error:
PS C:\Users\Geoffrey\Desktop\OP6T\twrp> fastboot boot twrp1.img
downloading 'boot.img'...
OKAY [ 0.628s]
booting...
FAILED (remote: Failed to load/authenticate boot image: Load Error)
finished. total time: 0.644s
The phone is unlocked, when I use the OnePlus 6T all in one tool and click Bootloader Status it says Unlocked
Please help me I really Don't know what to do

Why exactly are you trying to get into recovery?

Dark Nightmare said:
Why exactly are you trying to get into recovery?
Click to expand...
Click to collapse
Well I don't really need to get in to recovery I just thought i could help install the stock rom, what I want to do however is flash oxygen os on the phone, and I don't know how to do it through fastboot

Are you a t-mobile user? You're supposed to use the flash-all-partitions.bat file in order to flash the rom... What exactly have you done up to this point and what files are you using?

Dark Nightmare said:
Are you a t-mobile user? You're supposed to use the flash-all-partitions.bat file in order to flash the rom... What exactly have you done up to this point and what files are you using?
Click to expand...
Click to collapse
No I'm not a T mobile user, where can I get the flash-all-partitions.bat and what do i need to do with it ?
What have I done to get stuck in bootloader:
I unlocked my OP6T with the ALL IN ONE TOOL by mauronofrio
Flashed the TWRP from mauronofrio
But when I wanted to reboot the phone I figured out I was stuck in fastboot mode: if I try to boot in the os it boots in fastboot mode and same thing when I try to boot in the recovery
I don't know what happened..

GeoffreyLH said:
No I'm not a T mobile user, where can I get the flash-all-partitions.bat and what do i need to do with it ?
What have I done to get stuck in bootloader:
I unlocked my OP6T with the ALL IN ONE TOOL by mauronofrio
Flashed the TWRP from mauronofrio
But when I wanted to reboot the phone I figured out I was stuck in fastboot mode: if I try to boot in the os it boots in fastboot mode and same thing when I try to boot in the recovery
I don't know what happened..
Click to expand...
Click to collapse
https://forum.xda-developers.com/oneplus-6t/how-to/official-oxygenos-9-0-4-ota-oneplus-6t-t3860953

Dark Nightmare said:
https://forum.xda-developers.com/oneplus-6t/how-to/official-oxygenos-9-0-4-ota-oneplus-6t-t3860953
Click to expand...
Click to collapse
I'm sorry but I'm completely lost, I have downloaded the ROM but I can not flash it because I Don't have access to TWRP and I can't install it because of the error FAILED (remote: Failed to load/authenticate boot image: Load Error)
So what do I have to do ??
EDIT: I've found this https://forum.xda-developers.com/oneplus-6t/how-to/rom-stock-fastboot-roms-oneplus-6t-t3862516
I'll try to follow this guide, thank you a lot for your help, If this still doesn't work I'll tell you

1. Download the full rom
2. Put your device into fastboot
3. extract the contents of the full rom zip file
4. extract the images and the other flash zip file as well
5. run flash-all.bat, if that doesn't get you to boot, run flash-all-partitions.bat.

Id post your issues in the thread he linked. Specific to your device , most guys here in this thread are on tmo and it's a bit diff for us.
Sent from my ONEPLUS A6013 using Tapatalk

Dark Nightmare said:
1. Download the full rom
2. Put your device into fastboot
3. extract the contents of the full rom zip file
4. extract the images and the other flash zip file as well
5. run flash-all.bat, if that doesn't get you to boot, run flash-all-partitions.bat.
Click to expand...
Click to collapse
You're the man ! I successfully installed OOS thank you very much!

GeoffreyLH said:
You're the man ! I successfully installed OOS thank you very much!
Click to expand...
Click to collapse
Glad you're up and running man.

GeoffreyLH said:
You're the man ! I successfully installed OOS thank you very much!
Click to expand...
Click to collapse
Did you use flash-all or flash-all-partitions?

ram4ufriends said:
Did you use flash-all or flash-all-partitions?
Click to expand...
Click to collapse
Hey sorry for the late answer, I used flash-all.bat and waited 5 minutes then my phone rebooted

I can't find flash-all. Is it gone?

me too!
GeoffreyLH said:
Hello, my OnePlus 6T is stuck in fastboot mode, I'd like to install Oxygen OS (which I have the zip file on my PC) or install twrp on it in order to flash the OOS but here is the problem:
If I type the command fastboot devices, the phone is detected:
PS C:\Users\Geoffrey\Desktop\OP6T\twrp> fastboot devices
4872f361 fastboot
BUT, if I type fastboot boot twrp.img (with a command prompt in the folder of the file), I get this error:
PS C:\Users\Geoffrey\Desktop\OP6T\twrp> fastboot boot twrp1.img
downloading 'boot.img'...
OKAY [ 0.628s]
booting...
FAILED (remote: Failed to load/authenticate boot image: Load Error)
finished. total time: 0.644s
The phone is unlocked, when I use the OnePlus 6T all in one tool and click Bootloader Status it says Unlocked
Please help me I really Don't know what to do
Click to expand...
Click to collapse
I have the exact same problem! exactly!
---------- Post added at 08:33 PM ---------- Previous post was at 08:29 PM ----------
GeoffreyLH said:
You're the man ! I successfully installed OOS thank you very much!
Click to expand...
Click to collapse
I see this worked for you and Id like to try it but im a bit confused about what exactly to do. Could it be possible to have a more detailed explanation of the step by step things you did to fix this? I tried eveything you tried at first and got the exact same error message. I suspect if it worked for you it will work for me but I need a little more direction I guess.

Stuck on Fastboot, No recovery mode
Hey Guys...everytime i boot my oneplus 6t it remains stuck on fastboot mode , when i click on recovery mode it just gets back to the fastboot mode and also i am not able to start my phone. All i had done was format and factory reset using twrp and when i rebooted into system this all started hapening.It is also not recognised by PC..PLEASE HELP....

[email protected] said:
Hey Guys...everytime i boot my oneplus 6t it remains stuck on fastboot mode , when i click on recovery mode it just gets back to the fastboot mode and also i am not able to start my phone. All i had done was format and factory reset using twrp and when i rebooted into system this all started hapening.It is also not recognised by PC..PLEASE HELP....
Click to expand...
Click to collapse
Not recognized by the PC how? Are you trying to use the fastboot command? "fastboot devices" does anything come up?
You will need the fastboot ROM here, most likely to fix this.
Your last resort should be the MSMTool. (Remember it will relock your bootloader)

My Oneplus 6T is stuck on bootloop from 6 hours+ I've tried to hard reset the device, i have tried Volume Up + Power button, Recovery mode, deleting cache, none of it is working.
I had updated using the Oxygen Updater, 10.0 update, and it is now stuck forever in bootloop.
Please help

LG h918 in bootloop with only fastboot available. Help!

Hi All,
I just followed the instructions to root my h918 and then successfully updated to h91820h. I then used the TWRP app to flash twrp, and the Magisk app to update Magisk. After that I rebooted from the Magisk app, and now my phone is stuck in a bootloop. I cannot get into download mode, or recovery mode, or the system. I can get into fastboot mode by trying to go into download mode (holding the volume down and plugginto a USB port ot the laptop.
It seems that T-mobile removed any commands from fastboot that will help me. If I try to "fastboot reboot emergency", it just bootloops. If I try fastboot boot a twrp image, I get:
Code:
fastboot boot twrp-3.4.0-1-h918.img
downloading 'boot.img'...
OKAY [ 0.667s]
booting...
FAILED (remote: unknown command)
finished. total time: 0.686s
The command "fastboot reboot bootloader" boots to fastboot. The bootloader is indeed unlocked, but it looks like I'm stuck, because the LG fastboot doesn't allow anything to fix the brick.
Code:
$ fastboot getvar unlocked
unlocked: yes
finished. total time: 0.020s
I'm not finding any hope or help on Google. It seems if I can't boot into twrp or download mode, I'm toast, and I can't figure out how to boot into anything but the bootloader.
Does anyone have any suggestions on how to bring this phone back from the dead?
Thanks,
Rob

frohro said:
Hi All,
I just followed the instructions to root my h918 and then successfully updated to h91820h. I then used the TWRP app to flash twrp, and the Magisk app to update Magisk. After that I rebooted from the Magisk app, and now my phone is stuck in a bootloop. I cannot get into download mode, or recovery mode, or the system. I can get into fastboot mode by trying to go into download mode (holding the volume down and plugginto a USB port ot the laptop.
It seems that T-mobile removed any commands from fastboot that will help me. If I try to "fastboot reboot emergency", it just bootloops. If I try fastboot boot a twrp image, I get:
Code:
fastboot boot twrp-3.4.0-1-h918.img
downloading 'boot.img'...
OKAY [ 0.667s]
booting...
FAILED (remote: unknown command)
finished. total time: 0.686s
The command "fastboot reboot bootloader" boots to fastboot. The bootloader is indeed unlocked, but it looks like I'm stuck, because the LG fastboot doesn't allow anything to fix the brick.
Code:
$ fastboot getvar unlocked
unlocked: yes
finished. total time: 0.020s
I'm not finding any hope or help on Google. It seems if I can't boot into twrp or download mode, I'm toast, and I can't figure out how to boot into anything but the bootloader.
Does anyone have any suggestions on how to bring this phone back from the dead?
Thanks,
Rob
Click to expand...
Click to collapse
How are you trying to boot into download mode, are you trying to do it via fastboot or the hardware buttons?

frohro said:
Hi All,
I just followed the instructions to root my h918 and then successfully updated to h91820h. I then used the TWRP app to flash twrp, and the Magisk app to update Magisk. After that I rebooted from the Magisk app, and now my phone is stuck in a bootloop. I cannot get into download mode, or recovery mode, or the system. I can get into fastboot mode by trying to go into download mode (holding the volume down and plugginto a USB port ot the laptop.
It seems that T-mobile removed any commands from fastboot that will help me. If I try to "fastboot reboot emergency", it just bootloops. If I try fastboot boot a twrp image, I get:
Code:
fastboot boot twrp-3.4.0-1-h918.img
downloading 'boot.img'...
OKAY [ 0.667s]
booting...
FAILED (remote: unknown command)
finished. total time: 0.686s
The command "fastboot reboot bootloader" boots to fastboot. The bootloader is indeed unlocked, but it looks like I'm stuck, because the LG fastboot doesn't allow anything to fix the brick.
Code:
$ fastboot getvar unlocked
unlocked: yes
finished. total time: 0.020s
I'm not finding any hope or help on Google. It seems if I can't boot into twrp or download mode, I'm toast, and I can't figure out how to boot into anything but the bootloader.
Does anyone have any suggestions on how to bring this phone back from the dead?
Thanks,
Rob
Click to expand...
Click to collapse
im having the same problem, i dont have download more or twrp now, all i have is fastboot

i am going to assume going into download mode through fastboot is the only option for the two people posting for help here. from what i see from the posts, both hardware buttons sequence , or the plug in & down volume are the ONLY way to get to fast boot.
and fast boot is the only thing available on the phone.
i have labeled that a soft brick .
i asume one of the two help seekers have used the magisk 20.2 trap?
the release proved to be a problem , there is a tutorial on how to fix it.
i will go look for that and try to edit it into my responce later.
for now, are the two seekers already acomplished in this procedure?
TWRP Installation Tutorial for Linux Mint and Ubuntu users » AndroidGuru.eu
TWRP (Team Win Recovery Project) is an open-source custom recovery image for Android devices. It is a replacement for the stock recovery mode that is installed on most Android devices by the manufacturer. TWRP provides various advanced features and options that are not available in the stock...
www.androidguru.eu
20.2 problem notes and fix
Magisk 20.2 Kills LG V20 (All variants) Boot partition. Reverting to 20.1 fixes issue
So over in the LG V20 forum a lot of people are finding out that installing Magisk 20.2 throws the phone into Fastboot mode. https://forum.xda-developers.com/v20/help/direct-installing-magisk-update-wiped-t4028705...
forum.xda-developers.com

frohro said:
Hi All,
I just followed the instructions to root my h918 and then successfully updated to h91820h. I then used the TWRP app to flash twrp, and the Magisk app to update Magisk. After that I rebooted from the Magisk app, and now my phone is stuck in a bootloop. I cannot get into download mode, or recovery mode, or the system. I can get into fastboot mode by trying to go into download mode (holding the volume down and plugginto a USB port ot the laptop.
It seems that T-mobile removed any commands from fastboot that will help me. If I try to "fastboot reboot emergency", it just bootloops. If I try fastboot boot a twrp image, I get:
Code:
fastboot boot twrp-3.4.0-1-h918.img
downloading 'boot.img'...
OKAY [ 0.667s]
booting...
FAILED (remote: unknown command)
finished. total time: 0.686s
The command "fastboot reboot bootloader" boots to fastboot. The bootloader is indeed unlocked, but it looks like I'm stuck, because the LG fastboot doesn't allow anything to fix the brick.
Code:
$ fastboot getvar unlocked
unlocked: yes
finished. total time: 0.020s
I'm not finding any hope or help on Google. It seems if I can't boot into twrp or download mode, I'm toast, and I can't figure out how to boot into anything but the bootloader.
Does anyone have any suggestions on how to bring this phone back from the dead?
Thanks,
Rob
Click to expand...
Click to collapse
ok i found a way to get into twrp (if ever installed)
1- turn off your phone
2- hold Volume Down + Power button until you see the LG logo
3- When you see the Logo release the power button while still holding the volume down and immediately after release press power button 3 times.
4- you will see a factory reset screen, press yes twice and it will go to twrp.
NOW WE NEED TO FIND A WAY TO FLASH A WORKING ROM THRU TWRP

TWRP boot loop after Magisk 22 upgrade

Magisk updater installed Magisk & said it needed to make a change to continue the update. I clicked the Reboot button. The phone boots into TWRP. I reboot & it goes into TWRP. Repeat.
How can I recover, preferably w/o losing apps & most preferably w/o losing data like pics?
I'm using Android 9 rooted.

kamiller42 said:
Magisk updater installed Magisk & said it needed to make a change to continue the update. I clicked the Reboot button. The phone boots into TWRP. I reboot & it goes into TWRP. Repeat.
How can I recover, preferably w/o losing apps & most preferably w/o losing data like pics?
I'm using Android 9 rooted.
Click to expand...
Click to collapse
Backup>select data and internal storage>use a computer to move the backup file out
restore then
You can also try magisk uninstaller which comes with magisk on github(seach github magisk the uninstaller is in assets)

jjgvv said:
Backup>select data and internal storage>use a computer to move the backup file out
restore then
You can also try magisk uninstaller which comes with magisk on github(seach github magisk the uninstaller is in assets)
Click to expand...
Click to collapse
Good suggestions. Came back to phone & found battery ran out. Charged up & now it boot loops to fast mode only. Argh!

fastboot flash recovery twrp.img where the recovery image should be renamed 'twrp.img' and placed in the fastboot platform tools folder.
then
fastboot reboot recovery

jjgvv said:
fastboot flash recovery twrp.img where the recovery image should be renamed 'twrp.img' and placed in the fastboot platform tools folder.
then
fastboot reboot recovery
Click to expand...
Click to collapse
Tried 3 different cables including OnePlus. Same result.
fastboot boot twrp-3.3.1-x_blu_spark_v9.101_op6t.img
downloading 'boot.img'...
OKAY [ 0.867s]
booting...
FAILED (remote: Failed to load/authenticate boot image: Load Error)
finished. total time: 0.876s

kamiller42 said:
Tried 3 different cables including OnePlus. Same result.
fastboot boot twrp-3.3.1-x_blu_spark_v9.101_op6t.img
downloading 'boot.img'...
OKAY [ 0.867s]
booting...
FAILED (remote: Failed to load/authenticate boot image: Load Error)
finished. total time: 0.876s
Click to expand...
Click to collapse
Sorry. I see your rename note. Same result.
fastboot boot twrp.img
downloading 'boot.img'...
OKAY [ 0.840s]
booting...
FAILED (remote: Failed to load/authenticate boot image: Load Error)
finished. total time: 0.848s

I see the platform-tools note. I'm on Linux & the adb & fastboot tools are in /usr/bin, not a platform-tools folder.
Found one.
/usr/lib/android-sdk/platform-tools$ fastboot boot twrp.img
downloading 'boot.img'...
OKAY [ 0.881s]
booting...
FAILED (remote: Failed to load/authenticate boot image: Load Error)
finished. total time: 0.889s

hmmmmm
fastboot oem unlock (maybe device relocked when battery rn out)

I was able to get back to TWRP by switching slots. Backup fails because Data is encrypted & TWRP is not prompting for PIN. I'll try using the Magisk uninstaller tomorrow (past bedtime). Long shot.
Open to other approaches. Thanks for your help.

kamiller42 said:
I was able to get back to TWRP by switching slots. Backup fails because Data is encrypted & TWRP is not prompting for PIN. I'll try using the Magisk uninstaller tomorrow (past bedtime). Long shot.
Open to other approaches. Thanks for your help.
Click to expand...
Click to collapse
Facing the same authenticate error when trying to boot into twrp.img. I also don't know how useful twrp will be on the other slot if it can't decrypt the data from there so stuck at this stage too.
@kamiller42 Did you manage to resolve this with the Magisk uninstaller?

spinergist said:
Facing the same authenticate error when trying to boot into twrp.img. I also don't know how useful twrp will be on the other slot if it can't decrypt the data from there so stuck at this stage too.
@kamiller42 Did you manage to resolve this with the Magisk uninstaller?
Click to expand...
Click to collapse
Nope. I tried getting by by flashing just the boot image. It erased data & everything, so I flash Android 10 again & re-rooted.

kamiller42 said:
Nope. I tried getting by by flashing just the boot image. It erased data & everything, so I flash Android 10 again & re-rooted.
Click to expand...
Click to collapse
Did you flash all partitions?
Is there a way to only flash the boot partition, then boot into twrp.img, flash that, then reboot into recovery to decrypt the data? I care more about recovering my encrypted data than getting the phone working.

spinergist said:
Did you flash all partitions?
Is there a way to only flash the boot partition, then boot into twrp.img, flash that, then reboot into recovery to decrypt the data? I care more about recovering my encrypted data than getting the phone working.
Click to expand...
Click to collapse
That's what I thought. All was lost when I flash boot image. Technically, I flashed the fast boot partition from this post. https://forum.xda-developers.com/t/...t-stock-fastboot-roms-for-oneplus-6t.3862516/