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

[tomh12player]

Does it say "Service Unavailable, please contact the site admin" for anyone else after clicking confirm to recive the unlock bootloader email? (After IMEI and Device-id)

 

[Craleb]

So I must be dumb, i bought an h815 unlocked g4, and it has software version VX10b-EUR-XX but lg give me "unfortunately your device (united states-USA) cannot be unlocked.....

-_- I thought it was the EU version??

 

[datvu]

Is possible to relock bootloader after unlock ?

 

[force70]

Is possible to relock bootloader after unlock ?

Not at this time as per LG.

And what would be the point anyway?

Sent from my Nexus 6 or Note 4

 

[solokiller11]

Just a question (I have only a little knowledge about it), if to unlock the bootloader it requires the unlock.bin so can't we create from a locked bootloader something like lock.bin and flash it?
Or like to compare log from locked and unlocked bootloader and make a new bin file?

Sent from my LG-H815 using XDA Free mobile app

 

[datvu]

Not at this time as per LG.

And what would be the point anyway?

Sent from my Nexus 6 or Note 4

I was relocking bootloader on my Xperia Z in case of Complaint.

 

[Evnul000]

So I must be dumb, i bought an h815 unlocked g4, and it has software version VX10b-EUR-XX but lg give me "unfortunately your device (united states-USA) cannot be unlocked.....

-_- I thought it was the EU version??

It says the same for me too.

 

[alain57]

It says the same for me too.

I have the same version and i didn't tried yet.
there is still something surprising, as other people have a C version and as my phone says : no update available (i guess it was A version before but got and OTA that i installed)

---------- Post added at 11:35 AM ---------- Previous post was at 11:31 AM ----------

And what would be the point anyway?

if there is some material failure to relock it so that LG will not say : hey dude your device is unlocked, sorry but no warranty...
I find that LG should not do that ...
that there is no support for custom roms is normal
but the warranty about the HARDWARE should however stay...
If you got an issue with CPU, RAM, or Memory it would be too easy for LG to say : it is because of some custom software...
I mean lets pretend your touchscreen is not working well, why should a custom rom have any responsability and remove the warranty.... this is insane.

 

[raber111]

<suffix>ATWNWH</suffix>
thats my suffix . can i unlock bootloader?

 

[erany1]

help...

Nothing happens after I insert the second command ("fastboot oem device-id") - cmd window shows:
"< waiting for device >" & that's it. Nothing happens after that.
Trying to reset by command - fails. 10 Sec power off - also fails.
Lucky to be able to pull out the battery & restart the phone.
I have tried more than 5 times. I saw in another thread that someone mentioned it might be admin issues - I am the administrator on my PC & also running the "Minimal ADB and Fastboot" as admin.
Can you please say what am I missing here...?
thank's!

edit : As of today - 28th June, this method ONLY works on the H815 EU models

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.
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?

 

[the_scotsman]

Sounds like a driver issue. With the phone in Fastboot mode and connected via USB, check device manager to ensure the "android device" is detected and installed.

 

[erany1]

seems you are wright. android device is there when connected regularly... but marked withe yellow exclamation mark in fastboot mode.
how do i fix it?

Sounds like a driver issue. With the phone in Fastboot mode and connected via USB, check device manager to ensure the "android device" is detected and installed.

 

[the_scotsman]

seems you are wright. android device is there when connected regularly... but marked withe yellow exclamation mark in fastboot mode.
how do i fix it?

Reinstall the drivers while the phone is connected in fastboot mode. That might work. Ensure you are using the correct drivers.

 

[erany1]

Reinstall the drivers while the phone is connected in fastboot mode. That might work. Ensure you are using the correct drivers.

i connected my phone first, it automatically installed the drivers on the computer. but how can i get it now to reinstall when i'm connected in fastboot mode?

 

[the_scotsman]

i connected my phone first, it automatically installed the drivers on the computer. but how can i get it now to reinstall when i'm connected in fastboot mode?

Download this driver: http://downloads.codefi.re/autoprime/LG/LG_G4/LGUnitedMobile_Win_Driver_Ver_3.14.1.exe - Windows auto drivers won't work.

 

[zolom]

For my european g4 (unlockable bootloader) is it recommended to use the method on the OP, or use the new rooting method (for most variants) that was published yesterday?

Thanks

 

[AzuriaN]

Hi. It says that my IMEI and device-id doesn't match, but I'm sure i've checked atleast 10 times at it is correct! I think you have like 10 times on you to make it before they close your account, I have 2 left. Anyone know what the problem is?

 

[MrDeacon]

Hi. It says that my IMEI and device-id doesn't match, but I'm sure i've checked atleast 10 times at it is correct! I think you have like 10 times on you to make it before they close your account, I have 2 left. Anyone know what the problem is?

Exactly the same problem here with my GF's G4. I thousand-checked the numbers, everything is put in correctly. I emailed LG Dev and filed a complaint. A G4, bought at SIBA, with the correct model number, should in all fairness be unlockable.

 

[AzuriaN]

Exactly the same problem here with my GF's G4. I thousand-checked the numbers, everything is put in correctly. I emailed LG Dev and filed a complaint. A G4, bought at SIBA, with the correct model number, should in all fairness be unlockable.

Maybe it's because we are swedish :silly:

 

[AzuriaN]

Hi. It says that my IMEI and device-id doesn't match, but I'm sure i've checked atleast 10 times at it is correct! I think you have like 10 times on you to make it before they close your account, I have 2 left. Anyone know what the problem is?

I managed to get root access via "Low Effort Root", so it's no problem anymore.

EDIT: Well, I need to unlock to get custom recovery..

EDIT2: I got them matched finally, but my carrier says no.