Lg v20 h91820h t-mobile bootloader cannot be unlocked - android 8 oreo

[X_BlackBurn_X]

UPDATE:

I successfully unlocked the bootloader, flashed twrp, rooted, updated kernel and roms, tweaking gpu cpu for performance in pubg etc, greenify, flashify, power nap everything.
xposed framework take you in bootloop for this device.
now i am on kernel mk2000, superv20 rom, h91810u, 7 nougat.
if in future anyone feels any problem i am always here.
remember: linus is your friend for this device, and windows 10 suck.
and
sudo $(which fastboot) did miracles for me....

old post:

Hello everyone.

i am new here and i am sorry in advance if i did something wrong. i will come directly to the point.

model number: LG V20 T-MOBILE VERSION, H91820H, NON USA, Currently on oreo android 8.

we are not talking about any kind of roms kernels roots or anything here. just a simple question. " can this model's boot loader be unlocked ? like ever ? or not "
cause i have tried everything, when i say everything i mean everything. followed several posts on internet videos on you tube posts on XDA, tried using multiple PCs, multiple data cables, multiple drivers but for some reason i don't know what, this model's boot loader cannot be unlocked.

THE ERROR:

<WAITING FOR DEVICE> till eternity.

what i have done till now ?

1. lg drivers installed.
2. adb drivers installed with adb fastboot files.
3. updating legacy android adb interface driver, done.
4. went in to boot loader then connected the data cable and updated driver, done.
5. usb debugging oem unlock options activated, done.
6. restarted pc multiple times to update drivers, done.

we all know all it takes is 3 easy commands to unlock bootlaoder
adb reboot bootloader
fastboot oem unlock
fastboot reboot

but in my case i always stuck at 2nd command. waiting for device is shown and nothing happens.

then i ran command, adb devices>> it shows
List of devices attached
adb server is out of date. killing...
* daemon started successfully *
LGH9182bfc6bdc device

next i put the command, fastboot devices and nothing is shown i just go to the next line... c:\adb>
so this is for sure that my device is not connected to the fastboot.

now my only question is, can this device bootloader unlock or not ? so that i stop pushing my limits.

any help will be appreciated.
regards.

 

[clsA]

Hello everyone.



i am new here and i am sorry in advance if i did something wrong. i will come directly to the point.



model number: LG V20 T-MOBILE VERSION, H91820H, NON USA, Currently on oreo android 8.



we are not talking about any kind of roms kernels roots or anything here. just a simple question. " can this model's boot loader be unlocked ? like ever ? or not "

cause i have tried everything, when i say everything i mean everything. followed several posts on internet videos on you tube posts on XDA, tried using multiple PCs, multiple data cables, multiple drivers but for some reason i don't know what, this model's boot loader cannot be unlocked.



THE ERROR:



<WAITING FOR DEVICE> till eternity.



what i have done till now ?



1. lg drivers installed.

2. adb drivers installed with adb fastboot files.

3. updating legacy android adb interface driver, done.

4. went in to boot loader then connected the data cable and updated driver, done.

5. usb debugging oem unlock options activated, done.

6. restarted pc multiple times to update drivers, done.



we all know all it takes is 3 easy commands to unlock bootlaoder

adb reboot bootloader

fastboot oem unlock

fastboot reboot



but in my case i always stuck at 2nd command. waiting for device is shown and nothing happens.



then i ran command, adb devices>> it shows

List of devices attached

adb server is out of date. killing...

* daemon started successfully *

LGH9182bfc6bdc device



next i put the command, fastboot devices and nothing is shown i just go to the next line... c:\adb>

so this is for sure that my device is not connected to the fastboot.



now my only question is, can this device bootloader unlock or not ? so that i stop pushing my limits.



any help will be appreciated.

regards.

Are you following this > https://r.tapatalk.com/shareLink/to...3&share_fid=3793&share_type=t&link_source=app


[ROOT] - lafsploit - H918 (any version up to and including 20h) - now n00b friendly

Sent from my HD1907 using Tapatalk

 

[X_BlackBurn_X]

Thanks for thanks for replying on a short notice I have seen this post there is no reason to follow any of the post because the very first stage is to unlock the bootloader but as I cannot unlock the bootloader there is no point in following any of the posts my problem is what ever way I follow I am unable to to unlock the bootloader in fact what I can see is whenever I try to type in command ADB devices IC e my phone but when I type fastboot devices nothing happens it's like my phone is not in the fastboot that is why why I cannot unlock the bootloader I have tried every possible step mentioned on the internet and on various forums I also go through some videos on YouTube those guys follow the same steps and unlock their bootloader but my device cannot unlock for some reason so if you lovely people can help me out and figure out what exactly I am doing wrong as I have followed every step of unlocking the bootloader I've installed all the drivers I have updated all the drivers I have done exactly e all three steps which has been asked but still no luck thank you

 

[X_BlackBurn_X]

Are you following this > https://r.tapatalk.com/shareLink/to...3&share_fid=3793&share_type=t&link_source=app


[ROOT] - lafsploit - H918 (any version up to and including 20h) - now n00b friendly

Sent from my HD1907 using Tapatalk

To be very precise after following the first step while unlocking the bootloader in the second step when we type fast boot devices it should show some hexadecimal numbers and it should confirm us that our device is in the fastboot mode but in my case whenever I type this command nothing happens that means my device is not recognised to go in the bootloader this is the main problem there is no point in following any of the posts if you cannot complete the very first stage of unlocking your bootloader if you can figure out what exactly is the problem I will be thankful to you because I have followed every step possible I've updated every ADB drivers LG drivers but nothing is helping out as even before starting the procedure of unlocking the bootloader my device is not going in the fast boot also I noticed one thing when I try to go inside the bootloader screen before that in my device manager it is shown as composit device but after that I think it gets disconnected fastboot oem unlock cannot work as it gives a message of waiting for the device after going are using the command ADB reboot bootloader so my problem is the command fastboot oem unlock is pretty useless as it waits for the device and it's stuck there forever please help me out if you can I will be thankful to you regards

 

[C D]

To be very precise after following the first step while unlocking the bootloader in the second step when we type fast boot devices it should show some hexadecimal numbers and it should confirm us that our device is in the fastboot mode but in my case whenever I type this command nothing happens that means my device is not recognised to go in the bootloader this is the main problem there is no point in following any of the posts if you cannot complete the very first stage of unlocking your bootloader if you can figure out what exactly is the problem I will be thankful to you because I have followed every step possible I've updated every ADB drivers LG drivers but nothing is helping out as even before starting the procedure of unlocking the bootloader my device is not going in the fast boot also I noticed one thing when I try to go inside the bootloader screen before that in my device manager it is shown as composit device but after that I think it gets disconnected fastboot oem unlock cannot work as it gives a message of waiting for the device after going are using the command ADB reboot bootloader so my problem is the command fastboot oem unlock is pretty useless as it waits for the device and it's stuck there forever please help me out if you can I will be thankful to you regards

Did you downgrade to software version H91810P? Because that should be the first thing you have to do to get everything else to work afterwards.

 

[X_BlackBurn_X]

Did you downgrade to software version H91810P? Because that should be the first thing you have to do to get everything else to work afterwards.

Thanks for the reply.
Can you please clear me one thing. To downgrade from h91820h to h91810p you need to unlock bootloader if i am not wrong. And in that case we will be back to square 1.
Its not about installing custom rom kernel recovery root or anything. Its only about unlocking the bootloader which i cannot do.
I hope you understand my pain.

I just want to unlock my bootloader thats it.
It used only 3 commands.
1. Adb devices - shows my device.
2. Fastboot devices - no fastboot device found.

This is the problem. When you cannot find any fastboot device even updating driver by going inside the bootloader the entire mission gets failed.

I cant find any solution for this. I dont know for what reason my device cannot be listed in fastboot mode.

 

[clsA]

Thanks for the reply.
Can you please clear me one thing. To downgrade from h91820h to h91810p you need to unlock bootloader if i am not wrong. And in that case we will be back to square 1.
Its not about installing custom rom kernel recovery root or anything. Its only about unlocking the bootloader which i cannot do.
I hope you understand my pain.

I just want to unlock my bootloader thats it.
It used only 3 commands.
1. Adb devices - shows my device.
2. Fastboot devices - no fastboot device found.

This is the problem. When you cannot find any fastboot device even updating driver by going inside the bootloader the entire mission gets failed.

I cant find any solution for this. I dont know for what reason my device cannot be listed in fastboot mode.

fastboot doesn't work when the phone is booted up
adb reboot bootloader
followed by fastboot devices

Note: flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP

Example:

D:\fastboot>adb devices
List of devices attached
LGUS99740047103 device


D:\fastboot>adb reboot bootloader

D:\fastboot>fastboot oem device-id
...
(bootloader) ----------------------------------
(bootloader) Device-ID
(bootloader) F3D7DE171C893D55082EAE38270125EF
(bootloader) DA7CB3E78B1DB5709A2CA8********
(bootloader) ----------------------------------
OKAY [ 0.060s]
finished. total time: 0.060s

D:\fastboot>fastboot reboot
rebooting...

finished. total time: 0.008s

D:\fastboot>adb reboot bootloader

D:\fastboot>fastboot getvar unlocked
unlocked: no
finished. total time: 0.003s

 

[C D]

Thanks for the reply.
Can you please clear me one thing. To downgrade from h91820h to h91810p you need to unlock bootloader if i am not wrong. And in that case we will be back to square 1.
Its not about installing custom rom kernel recovery root or anything. Its only about unlocking the bootloader which i cannot do.
I hope you understand my pain.

I just want to unlock my bootloader thats it.
It used only 3 commands.
1. Adb devices - shows my device.
2. Fastboot devices - no fastboot device found.

This is the problem. When you cannot find any fastboot device even updating driver by going inside the bootloader the entire mission gets failed.

I cant find any solution for this. I dont know for what reason my device cannot be listed in fastboot mode.

As clsA said, flashing firmware does not require an unlocked bootloader.
Look at parts 1 and 2 of the other step by step guide here:
https://forum.xda-developers.com/v20/how-to/step-step-guide-lg-v20-h918-unlocking-t3808258

 

[X_BlackBurn_X]

fastboot doesn't work when the phone is booted up
adb reboot bootloader
followed by fastboot devices

Note: flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP

Example:

Thanks for the solution. May be this is it. All the time i have been doing it wrong.

Solution : flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP.

I will downgrade from 20h to 10p now and will give you feedback on this soon. Thanks a ton for showing a noob like me the right direction to work.

 

[clsA]

Thanks for the solution. May be this is it. All the time i have been doing it wrong.

Solution : flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP.

I will downgrade from 20h to 10p now and will give you feedback on this soon. Thanks a ton for showing a noob like me the right direction to work.

No problem the link @C D posted above seems to have all the working links for you

 

[X_BlackBurn_X]

No problem the link @C D posted above seems to have all the working links for you

well we have a new problem now.

lgup error 0x2bc invalid command response code = 0x80000202 at 4 percent while flashing.
did i just brick my phone now ? as it says dont unplug until you are done and we have been getting same error again and again.

used the provided kdz file flashing as an upgrade.

 

[X_BlackBurn_X]

ok so the new problem is... may be i was trying to flash h91810p naugaut on to a oreo h91820h
and if i am not wrong at this stage i messed up pretty bad my phone is stuck in donwload mode wont boot up and i need to flash back 20h again to get out of this mess. can anyone hlp me ....

i just wanna know h91810p downgrading from 91820h is possible or not ? cause one is naugaut and one is oreo.

 

[X_BlackBurn_X]

UPDATE:

i was flashing wrong h91810p thats why it was showing error. on another website i got the file compatible to my phone t mobile version and flash was successful.
now i am on h91810p software version andriod 7.

problem UPDATE:

i still cant unlock bootloader. same problem as before downgrading from h91820h.
adb devices shows device.
adb reboot bootloader
fastboot devices gives no result.
phone cannot enter in fastboot mode. the problem still remains the same even after changing the software.

kindly help guys

 

[X_BlackBurn_X]

fastboot doesn't work when the phone is booted up
adb reboot bootloader
followed by fastboot devices

Note: flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP

Example:

hello clsA
"
D:\fastboot>adb devices
List of devices attached
LGUS99740047103 device

D:\fastboot>adb reboot bootloader
D:\fastboot>fastboot oem device-id

after this it only says waitng for device"

now i am on h91810p as i was instructed. can you please help.
its all happening the same way it was happening when was on h91820h.
fastboot devices cannot be found.
once it reboots in bootloader then it should detect a fastboot device but it doesnot and adb is also lost there.
kindly help.

 

[X_BlackBurn_X]

NEW UPDATE:

my lg v20 now on software h91810p is actually a T MOBILE version. and when i researched more about it i found out T MOBILE deliberately locks the boot loader of many devices and its unlockable.
possible work around can be if the software version installed on your phone can some how be an international version of your ROM, then only you can unlock the bootloader else none of your commands will work. now i am trying to flash this phone using an international ROM version if i succeed i will update. but according to my knowledge flashing other roms other than t mobile ones will definitely give errors in LGUP.

 

[C D]

NEW UPDATE:

my lg v20 now on software h91810p is actually a T MOBILE version. and when i researched more about it i found out T MOBILE deliberately locks the boot loader of many devices and its unlockable.
possible work around can be if the software version installed on your phone can some how be an international version of your ROM, then only you can unlock the bootloader else none of your commands will work. now i am trying to flash this phone using an international ROM version if i succeed i will update. but according to my knowledge flashing other roms other than t mobile ones will definitely give errors in LGUP.

Do not flash another model's firmware onto the H918! Doing so will permanently brick your phone. The H918 in particular is incompatible with all other variants' software. Also, flashing H918 firmware onto any other model will also brick that phone.

 

[X_BlackBurn_X]

Do not flash another model's firmware onto the H918! Doing so will permanently brick your phone. The H918 in particular is incompatible with all other variants' software. Also, flashing H918 firmware onto any other model will also brick that phone.

hello
thanks for the reply.
i know we cannot flash any other phones firmware on to this model.
i was thinking of flashing specifically lg v20 h91810p international stock firmware, one is t mobile and one is international stock rom of same model.
cause t mobile is not allowing me to unlock the bootloader but an international stock rom will.

i have seen people doing on t mobile on youtube videos i dont know how they are doing it.

my problem is :
" as in message sent to various senior on this topic"

LG V20 H91810P, T MOBILE BOOTLOADER CANNOT BE UNLOCKED
HELLO

can you please help me out on a quest to unlock my bootloader of lg v20 h91810p. i have downgraded from h91820h to h91810p and still all the adb commands fail to make my phone go in to fastboot mode. i just cannot enter in fastboot mode,
adb devices shows my device
|but fastboot devices in bootloader mode doesnot show my device at all.
updated all the drivers used multiple pcs usb ports but no luck at all.,
what am i possibly doing wrong can you please help me out? i will be thankful to you.

on a side note i think t mobile has lockedd my bootloader so that i canoot unlock it,

regards

 

[clsA]

hello

thanks for the reply.

i know we cannot flash any other phones firmware on to this model.

i was thinking of flashing specifically lg v20 h91810p international stock firmware, one is t mobile and one is international stock rom of same model.

cause t mobile is not allowing me to unlock the bootloader but an international stock rom will.



i have seen people doing on t mobile on youtube videos i dont know how they are doing it.



my problem is :

" as in message sent to various senior on this topic"



LG V20 H91810P, T MOBILE BOOTLOADER CANNOT BE UNLOCKED

HELLO



can you please help me out on a quest to unlock my bootloader of lg v20 h91810p. i have downgraded from h91820h to h91810p and still all the adb commands fail to make my phone go in to fastboot mode. i just cannot enter in fastboot mode,

adb devices shows my device

|but fastboot devices in bootloader mode doesnot show my device at all.

updated all the drivers used multiple pcs usb ports but no luck at all.,

what am i possibly doing wrong can you please help me out? i will be thankful to you.



on a side note i think t mobile has lockedd my bootloader so that i canoot unlock it,



regards

Did you make the Linux USB boot stick
Are you following the guide at all?

PART 3: CREATING A BOOTABLE LINUX USB USING FWUL

DOWNLOAD FWUL_v2.7_x86_64_15GB.zip FROM THE LINK BELOW AND EXTRACT THE IMAGE FILE SOMEWHERE IN YOUR PC.

https://androidfilehost.com/?w=files&flid=214529

DOWNLOAD RUFUS FROM BELOW AND INSTALL

https://rufus.akeo.ie/

INSERT A PEN DRIVE IN YOUR PC AND RUN RUFUS.

INSIDE RUFUS SELECT THE IMAGE FILE AND SELECT START (AFTER SELECTING START SELECT DD MODE IN THE DIALOGUE BOX) TO CREATE A BOOTABLE PEN DRIVE (WARNING: THIS WOULD FORMAT YOUR PEN DRIVE)

NOW YOU SHOULD BOOT YOUR PC FROM THE BOOTABLE USB STICK WHICH YOU HAVE JUST CREATED

THIS WOULD MAKE YOUR PC RUN LINUX OS

TYPE PASSWORD AS linux AND ENTER

Sent from my HD1907 using Tapatalk

 

[X_BlackBurn_X]

Did you make the Linux USB boot stick
Are you following the guide at all?

PART 3: CREATING A BOOTABLE LINUX USB USING FWUL

DOWNLOAD FWUL_v2.7_x86_64_15GB.zip FROM THE LINK BELOW AND EXTRACT THE IMAGE FILE SOMEWHERE IN YOUR PC.

https://androidfilehost.com/?w=files&flid=214529

DOWNLOAD RUFUS FROM BELOW AND INSTALL

https://rufus.akeo.ie/

INSERT A PEN DRIVE IN YOUR PC AND RUN RUFUS.

INSIDE RUFUS SELECT THE IMAGE FILE AND SELECT START (AFTER SELECTING START SELECT DD MODE IN THE DIALOGUE BOX) TO CREATE A BOOTABLE PEN DRIVE (WARNING: THIS WOULD FORMAT YOUR PEN DRIVE)

NOW YOU SHOULD BOOT YOUR PC FROM THE BOOTABLE USB STICK WHICH YOU HAVE JUST CREATED

THIS WOULD MAKE YOUR PC RUN LINUX OS

TYPE PASSWORD AS linux AND ENTER

Sent from my HD1907 using Tapatalk

thanks again for the showing me the right direction. i was talking about unlocking the bootloader in step 1.
i will go through your links and try to study this.
just one more question.
does this method unlocks the bootloader ?
if yes please reply yes i will be thankful to you.
i will follow this step now.

regards

 

[cnjax]

hello clsA
"
D:\fastboot>adb devices
List of devices attached
LGUS99740047103 device

D:\fastboot>adb reboot bootloader
D:\fastboot>fastboot oem device-id

after this it only says waitng for device"

now i am on h91810p as i was instructed. can you please help.
its all happening the same way it was happening when was on h91820h.
fastboot devices cannot be found.
once it reboots in bootloader then it should detect a fastboot device but it doesnot and adb is also lost there.
kindly help.

Why does adb show your device as a 997 which is the Sprint variant

Sent from my LG-H910 using XDA Labs