[Unlock Bootloader,Install TWRP,Root Guide] H815EU-ONLY

[CallumL33]

Hey please reply quick!! I have followed all instructions but after flashing super su in twrp my phone bootloops. I cannot boot into TWRP again and when I try boot via hardware keys I only get the stock option to wipe data. I just bought my G4 so I am pannicking right now. Quick responses will be helpful. Thanks

 

[csjneek]

Answer yes to factory reset and you get to twrp. This is how g4 boots to twrp

 

[CallumL33]

Answer yes to factory reset and you get to twrp. This is how g4 boots to twrp

I pressed yes twice and it showed the little android then rebooted. Does this mean I didnt properly install TWRP?

 

[csjneek]

Yes. If you can boot to os and have root try and flash twrp.img with flashify, if not " fastboot boot twrp.img then from twrp recovery flash twrp.img

Trimis de pe al meu SM-T320 folosind Tapatalk

 

[CallumL33]

Yes. If you can boot to os and have root try and flash twrp.img with flashify, if not " fastboot boot twrp.img then from twrp recovery flash twrp.img

Trimis de pe al meu SM-T320 folosind Tapatalk

When I try boot into OS it bootloops. Any other ideas?

 

[the-erazer]

Last week my g4 bricks in case of hardware issue. Now i got a new one from warrenty. It comes with h815 v20d on it and is from vodafone germany. Bootloader unlock was easy but when i tried to boot into recovery it failed. No reaction from the phone only reboot to os. Fastboot boot twrp.img didn't work also fastboot flash recovery twrp.img didn't work... So i tried twrp for h811 and then fastboot boot works and then i was able to flash supersu... Just in case someone is in the same situation... This solution works for me. It was the new twrp 3.0 for h811

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[MaorSwan]

I can't boot into TWRP.
I habe unlocked my device, now I have this problem:
My computer shows me the name of the file as twrp.img.mid5, and when I place it in my phone and in my computer and cmd the folder, it says "no error" or "can't load" or "no file or directory" etc. And if I remove the "mid5" it becomes a legit image file but when I try to boot into TWRP it says "booting.. Failed (dtk something)".

Also, I can only cmd the folder on my pc but not on my storage, there's no such option to do that on my storage.

I'm clueless, what should I do? Thanks.

 

[the-erazer]

I can't boot into TWRP.
I habe unlocked my device, now I have this problem:
My computer shows me the name of the file as twrp.img.mid5, and when I place it in my phone and in my computer and cmd the folder, it says "no error" or "can't load" or "no file or directory" etc. And if I remove the "mid5" it becomes a legit image file but when I try to boot into TWRP it says "booting.. Failed (dtk something)".

Also, I can only cmd the folder on my pc but not on my storage, there's no such option to do that on my storage.

I'm clueless, what should I do? Thanks.

You could use adb to show your storage... Try adb shell and then navigate like cd... Or ls to list the folder

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[cluttered_butter]

edit : As of today - 28th June, this method ONLY works on the H815 EU models
update 26th July : Please go check the dream team's ROOT thread located here : [ROOT] TMO/VZW/ATT/SPRINT/INTL Root your LG G4 with Low Effort Root!
Thanks @thecubed , @autoprime , @IllegalArgument & @jcase for their hard work

Hi guys, a quick step by step guide to how I was able to unlock, install TWRP and Root my H815. Please don't hold me responsible if any issues arise with your phone. If you do this, you take your own responsibilities.

I tend to download all the tools in a single folder so it is easier to manage.

The LG Site:
1. go to this LINK and register.
2. you will get a confirmation email.
3. go to this LINK to unlock your bootloader (you will find the information on how to get your IMEI and Device ID lower in the post)

Your PC :
1. Be sure to have the LG drivers (i connected my phone first, it automatically installed the drivers on the computer.
update 27th July : thanks @the_scotsman in case you have driver issues please download these provided by @autoprime : LGUnitedMobile_Win_Driver_Ver_3.14.1
2. Be sure you have installed the ADB stuff that can be found here : Minimal ADB & Fastboot & ADB Installer (type Y to all the questions asked)
Install Minimal ADB first. Then type Y to all the questions the ADB installer asks. Close both windows once done.

Download TWRP 2.8.7. for H815:
1. go to this LINK and download it. Add it to your folder

Download SuperSu 2.46:
1. Download SuperSu 2.46 HERE (thanks @Chainfire ) and add it to your folder

PC & G4 love :
Once you are sure you have completed all the above tasks start rolling :
A. Enter your IMEI on the LG page
- you can find your IMEI on the G4 by going to settings > about phone > status
B. Get your Device ID:
1. hook up your LG on your PC (be sure not to be locked on your lockscreen, That USB debugging is checked and OEM checked in the Developer Options)
2. launch your CMD and type:

adb reboot bootloader

your phone will reboot
3. type this to get your Device ID

fastboot oem device-id

4. You will see two lines of number. Copy them and paste them together (to make one line) in the the Device ID fields on the LG site.
5 type :

fastboot reboot

5. close CMD
5. click Confirm on the site and you will receive by email a file called : unlock.bin.

Unlocking your bootloader:
1. once you get your LG email, save the unlock.bin in your folder
2. launch CMD from the folder (hold shift, right click the folder)
3. in CMD type :

adb reboot bootloader

4. once your phone is rebooted in bootloader type :

fastboot flash unlock unlock.bin

5. then reboot your phone by typing :

fastboot reboot

Normally your phone now has it's bootloader unlocked. When it boots you should see a message on the top left of the screen saying that.

COPY SuperSu and the downloaded TWRP file onto your phone (i put it in the download folder in the phone, not the SD) so you are ready for the next steps

Booting TWRP via ADB and bootloader mode
I personally think this was the easiest way to be able to root and clean install TWRP. Be sure your TWRP is in the folder.
1. Launch CMD from the folder (hold shift, right click the folder)
2. type (again) :

adb reboot bootloader

3. once your phone reboots and is in bootloader mode type :

fastboot boot TWRP2861.img

the new name of the file
or

fastboot boot p1.img

if you didn't rename it.
4. now you will reboot into TWRP.

Installing SuperSu
1. once you are in TWRP click install and go find your SuperSu file.
2. Swipe to install.
3. Once installation is done, reboot to system.

Once you have rebooted into the OS you will find the SuperSu app. Download the TWRP manager just to have it handy. And now i would install the TWRP file you have copied on your phone with flashify. I think it's a great tool.
2 ways to do it:
1. locate the file, click on it and choose to open with flashify then choose recovery and follow the steps
2. find the file via flashify and install.
(Don't download TWRP for H815 in the TWRP manager or Flashify as they are not fixed by @wolfgart (correct me if I am wrong))

once all this done and rebooted. Your phone will have TWRP and would be Rooted. Choose the TWRP manager to boot into recovery when you want.

I preferred to reboot the phone every time just to be sure...

If you have any comments, or i wrote something wrong, don't hesitate to correct me.

Have fun

UPDATE : Thanks to @autoprime you can also update your H815 EU to the latest Stock ROM : 10C (don't forget to thank him, as those guys are working hard to make your life easier!)


@the_scotsman, maybe you can pin this to help the lost souls until a one app does it all appears?

Thank you so much! I finally have root!!

 

[Charles Collins]

What do you do when you've installed TWRP and you get to the page where you have to choose either to allow TWRP to modify your phone or not?

Sent from my LG-H815 using XDA Free mobile app

 

[the-erazer]

Did someone manage to flash twrp on h815 v20d? I only can load temporary twrp for h811 to flash supersu... If i flash twrp for h815 in flashify its does nothing only factory reset if i enter adb reboot recovery

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[dorwoo]

After flashing super su the phone its stuck in bootloop,what should i do?

 

[the-erazer]

After flashing super su the phone its stuck in bootloop,what should i do?

What version of android are you using? If you are on marshmallow just take this http://forum.xda-developers.com/showthread.php?t=2868133 you also can restore your rom by using lgup and kdz

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[dorwoo]

Restored with lgup, now running custom mm rom, all good.

Sent from my LG-H815 using Tapatalk

 

[djnata]

I have a big problem with my new LG G4 and i hope xda can help my. I have update to Android 6.0, unlocked the bootloader, and installed TWRP. This has everything works. Then i installed SuperSU with TWRP and now the phone will not boot. When I start the phone, then I only see the LG logo and is in the top left: "Bootloader state: bootloader unlocked (please look this screenshot: postimg.org/image/qzumppnb9). I can not in the recovery with the Power-Button and Volume Down. And i can not connect with ADB/Fastboot.

 

[calyxim]

This method soft bricked my phone as well. For solution; just install the lg bridge software and click on "error state" or that kind of prompt on the bottom right corner of the software. It will download a 1.5gb file and get your phone back to stock.
TLDR: THIS METHOD WILL BRICK MARSHMALLOW INSTALLED DEVICES.

 

[GunJack97]

Are u using Android 6.0? Is This Methot Works on Android 6.0?

Are u using Android 6.0? Is This Methot Works on Android 6.0? I already Did This But I had a Problem with Boot Loop. then i Recover my phone with LG Bridge...Can i Still DO Thes Method Again??

 

[kahmad989]

This method soft bricked my phone as well. For solution; just install the lg bridge software and click on "error state" or that kind of prompt on the bottom right corner of the software. It will download a 1.5gb file and get your phone back to stock.
TLDR: THIS METHOD WILL BRICK MARSHMALLOW INSTALLED DEVICES.

So if I want to install a custom rom..i have to go back to 5.1 do the rooting and stuff and then install the roms?

 

[Prezlamen]

Done!

After some trouble i managed to make everything right.
This method works fine on MM v20c, only difference that you need to flash latest supersu (in my case 2.71 beta THANKS member the-eraser for posting that) instead the one in tutorial. Flashing that old Supersu gave me bootloop.
Only thing that helped me recover my phone was flashing v20c kdz via LGUP from this site http://www.android-hilfe.de/thema/android-6-zurueck-zu-lp-android-5.733674/
THANKS member dolasz for this link.
just plugged it in by holding volume up and click on update and browse to downloaded kdz.

After recovering my phone i did all according to SAOs tutorial and flashed supersu 2.71.....no bootloop. Flashed TWRP via flashify.

Hope my expirience helped, GG

 

[jamious-daywalker]

Ok ive downloaded the files, popped them into a folder called "tools" in my c drive, went to install as its put [both Minimal ADB & Fastboot & ADB Installer (type Y to all the questions asked)......but alas i dont get asked anything ....the keeps the cmd open the other runs through lots of stuff quickly then auto closes/finishes]

ive installed the lg software, connected my lg g4 to my laptop [running win10] ive got the debugging checked, and the other options needed checked on my phone too.....

OK ----UPDATE
I was opening a standard CMD window, didnt realise it was the Minimal ADB / Fastboot CMD window shortcut.........managed to gey my key but now having issues with once ive booted up into that bootloader menu, and then CMD its saying "error cannot load unlock.bin" even though its in my "tools" folder with everything else ive downloaded/ installed

OK-----UPDATE 2
I ended up copying then pasting the unlock.bin file to documents, downloads, c-drive, the tools folder in c-drive, my d-drive, and desktop.....one of which actually worked lol