Korean variant bootloader unlock and root.

Gera77 said:

my device is not rooted, I don't even know how to root… Thanks!

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defic said:

I was following the video and it has link to file:
Rom_LGv30_V300s_v21e_Oreo_full_stock.zip

I have Android security patch level
May 1, 2018

And Software version:
V300K21g

On the video @bilong9 has March 1, 2018 security patch level and V300K21e software version. Other software info are the same. Can I use the Rom and other files on that video? Sorry for noob questions

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You need to enter the different boot menus (mainly factory data reset menu and fastboot menu) many times, so I just have notes here on the top of how it should happen

- Download mode
How to enter : Device power is off, hold volume up -> insert usb cable -> should go to download mode

- Factory data reset menu
Hold Power button and volume down button when boot starts. After some seconds (when phone vibrates or LG logo is visible) let go of power button for 1 second, and then click power button. (This caused me the most headaches, as if I were holding the buttons for too long, the device would cut power and reboot)

fastboot mode
- when device is shut down and without usb cable, hold volume down button for few seconds and plug in usb cable

--------------------------------------------------------------

First, Download files:

- LGup V30DLL_PATCHED
https://drive.google.com/file/d/1zvpcaYC6oDmksqvgXqLw9B2K5KjAQYm5/view

- LGup needs you to install download LG Mobile drivers
http://tool.cdn.gdms.lge.com/dn/downloader.dev?fileKey=UW00120120425

- kdz H930
https://drive.google.com/file/d/1CbKGw7TVQ-kLTfraEA39GJridtexwrXw/view

- kdz Us988
https://drive.google.com/file/d/151TbShPdh9VyV5RBXZEQitFztduIF_H5/view

- Adb.unlock.twrp.root
https://drive.google.com/file/d/1SvXeQK2xVk7N9yWEh7efYOZMyl199nwD/view


Depending on your variant (v300k / v300s / v300L) download one of the following files:

- For v300k: Rom zip v300k_21e (twrp) Rom running on us998 platform
https://drive.google.com/file/d/1DSCmNuL9gR6BhpEfv-rjWa4m8skDBfty/view
OR
- For v300s & v300L: Rom zip v300s_21e (twrp) Rom running on us998 platform
https://drive.google.com/file/d/12wHjqu_04ueeD77AgwtDrliE6hXS7blr/view


Move files to microSD card of the phone
- Rom_LGv30_V300s_v21e_Oreo_full_stock.zip ( pick your variant )
- 1Magisk-v16.0.zip
- 2no-verity-opt-encrypt-6.0.zip
- 3lg-rctd-disabler-1.0.zip

Enable developer settings on Android settings

On Developer options
- Enable OEM unlock
- Enable USB Debugging

Connect Device to PC with USB. For me the usb mode had to be File Transfer (I read somewhere that it had to be Photo transfer, but that did not work with LGUP.exe for me

Start LGUP.exe
- If popup "Cant find handset", plug out and in usb on the phone.
- If popup "LGUP can't load the model[C:\Program Files(x86)\LG Electronics\LGUP\..." then create that LGUP folder and copy the model folder to it from LGUP V30DLL_PATCHED folder
- Choose PARTITION DL
- Select file H93020d_00_OPEN_EU_OP_0326.kdz
- Press Start
- From Partition List, tick Select All and press OK
- Phone will reboot to the flash menu
- LGUP_common popup will appear about Partition(s) changed "cache" etc. Press Yes
- Wait for it to finish
- When finished, and screen disappears, immediately hold both power and volume down button, when lg screen appears, stop pressing power button for 1 second, and then click power button once (If you don't time it right, you get stuckin LG life's good screen. Try again by holding volume down and power button for 8 seconds and device restarts)
- In Factory data reset menu delete all.
- Device will boot to android Setup

Setup Android
- Go through the setup steps
- Enable developer settings on Android settings

On Developer options
- Enable OEM unlock
- Enable USB Debugging

On computer, open cmd-here.exe
- enter command to check if device is found: adb devices
- enter command: adb reboot bootloader
- enter command: fastboot getvar all
- From the output: unlocked:no
- enter command: fastboot flash unlock unlock.bin
- Output will say "Failed (remote: Error!! Wrong unlock key size)", don't mind that
- Press Power button
- You will see error message on the device, hold volume down button until you can hear usb connection sound from computer (?)
- Device will boot
- Once booted, shutdown from android menu
- remove usb cable
- Enter download mode by holding Volume up button and then insert usb cable

Open LGUP.exe
- Choose PARTITION DL
- Select US99820a_04_0330.kdz
- Press Start
- From partition list, tick Select all and Ok
- Partition changed popup: press ok.
- As soon as it is done and screen goes black, Hold volume down and power button. when LG v30 screen is visible, let go of power button for 1 second, and then click power button.
- Erase all to factory settings
- Let device boot. As soon as it is booted, shut down android from menu
- When shut down, it starts to reboot, press volume down for few seconds to enter fastboot menu

In fastboot menu
- open cmd-here.exe again.
- Enter command: fastboot getvar all
- Output should now say "unlocked:yes"
- Enter command: fastboot flash recovery TWRP-3.2.1-joan-v0.1.img
- Output should say: "Ok"
- shutdown device by pressing power button. After power off, start holding powerbutton and volumedown button to enter Factory data reset menu. When logo appears or phone vibrates let go of power button, and after 1 second tap power button. Reset all
- Device should go to TWRP
- If device booted to Android, TWRP needs to be flashed again ( Do steps: turn of from power menu, enter fastboot menu, flash TWRP from command line, enter Factory reset on first boot and delete everything ).

In TWRP
- First press Cancel (on Mount: Decrypt Data screen)
- Swipe to Allow Modifications
- press Wipe
- press Format Data
- type: Yes
- Press Check on keyboard
- Output Data Format Complete
- Press back to get to Wipe screen
- Swipe to Factory Reset
- press Back and choose Advanced Wipe
- Tick: Dalvik / ART Cache, System, data, cache
- Swipe to Wipe
- Press home button

Take backup of stuff

press Install on TWRP home:
- Locate files that were copied to microsd card before
- If files are not on microSD card, they can be copied from computer using command: adb push localfile destination
(f.e: adb push Rom_LGv30_V300k_v21e_Oreo_full_stock_v1.zip /external_sd )
- Choose Rom_LGv30_V300k_v21e_Oreo_full_stock_v1.zip (or your variant)
- Swipe to confirm Flash
- Wait until finished
- Output should say: "Zip succesfully installed have fun"

Press Install on TWRP home:
- Choose 1Magisk-v16.0.zip
- Swipe to confirm Flash
- Output gives Failure for some reason( also happens in BiLong video, idk the reason )
- Install both:
2no-verity-opt-encrypt-6.0.zip
and
3lg-rctd-disabler-1.0.zip
- both outputs should say: Successful

From TWRP home press Reboot
- Press System
- Press Do Not Install

Phone should now reboot to Android and have mobile signal
- Go through setup
- Press shutdown
- Enter Factory data reset menu. When logo displays, let go of power, and after 1 second, click power button. Erase everything

Phone goes to TWRP
- Swipe to Allow Modifications
- Go to Install
- Locate files on microSD card
- Choose 1Magisk-v16.0.zip and swipe to flash
- Now it should install successful
- Install both:
2no-verity-opt-encrypt-6.0.zip
and
3lg-rctd-disabler-1.0.zip
- press reboot system
- press Do not install (why?)

Now you are rooted and have Magisk Manager on desktop

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defic said:

Thanks, worked for me too! Thanks to @bilong9 s video and @ChazzMatt advice on the original thread. I pretty much followed bilongs video, but I wasn't always sure which buttons @bilong9 pressed, so I took notes of what I did to better understand what is happening (last time I rooted Android was back in the days with note 3). It might be that I did something unnecessary, but in the end I got root. (I Had Security patch level: 1 May, 2018. Future security levels might not work)

I'll leave my (quite detailed) notes here if somebody finds it useful basically it is just text version of @bilong9 youtube video. All credit to him of the links and steps

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bilong9 said:

Your written instructions are very detailed. Thank you
V300s works with v300L

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defic said:

I wanted to get rid of the korean rom bloatware (and korean text all over the place) so I DL partition flashed h930 EU Rom without xbl1, xbl2, modem, recovery and recoverybak with the patched LGUP. For some reason, I still lost recovery (maybe because I did not manage to do the button dance on first boot?). Then in Fastboot mode I reflashed TWRP, got in to twrp and rooted the phone again.

Calls and data are both working. But when booting the phone, it seems to take longer time than before to get sim signal (around 30 seconds after inserting PIN code). Also when I made my very first call, signal disappeared but came back after a reboot. It has not occured anymore. Also Lte Multiband selection engineering menu is not working, but that was kinda expected.

I kept korean xbl1 and xbl2 because I found a post by @bilong9 when he first discovered how to get signal back. I don't know if signal would work with only korean rom modem.

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nythawk23 said:

fastboot's not working on my v300L

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Umedchik said:

Hello to all. I have been following the detailed instructions by Defic based on Bilong9 and watching also video in youtube, so I have got well prepared before unlocking bootloader in my LG V30 v300k. Thanks a lot, I could unlock bootloader and installed root and TWRP, but I faced at the end with a problem of missing carrier signal. I thought maybe I have done mistake and downloaded stock and flashed it in LGUP in Refurbished mode since Bilong9 has advised to somebody with the same issue. After that I have flashed KDZ US988 since I had already bootloader unlocked, then I installed again v300k file provided in the instruction. I don't have still carrier signal. Please, help me to resolve my issue with your advises, how can I bring back carrier signal? I don't want to brick my phone, may be the issue with modem, is there possibility of installing only modem seperatetly via TWRP, will this work? What if I install firmware in LG bridge, will this work and will I loose unlocked bootloader? Thank you all in advance.

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defic said:

I wanted to get rid of the korean rom bloatware (and korean text all over the place) so I DL partition flashed h930 EU Rom without xbl1, xbl2, modem, recovery and recoverybak with the patched LGUP. For some reason, I still lost recovery (maybe because I did not manage to do the button dance on first boot?). Then in Fastboot mode I reflashed TWRP, got in to twrp and rooted the phone again.

Calls and data are both working. But when booting the phone, it seems to take longer time than before to get sim signal (around 30 seconds after inserting PIN code). Also when I made my very first call, signal disappeared but came back after a reboot. It has not occured anymore. Also Lte Multiband selection engineering menu is not working, but that was kinda expected.

I kept korean xbl1 and xbl2 because I found a post by @bilong9 when he first discovered how to get signal back. I don't know if signal would work with only korean rom modem.

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