[GUIDE] Upgrade H815 Locked-BootLoader to Official Android 7.0 v29A

ling751am · Oct 7, 2017

In this thread - Update LG G4 H818P to android 7 by LG-H815 Official v29A.
@hochocnua upgrade H818P to v29A using the LG Poland Official v29A firmware zip which comes from here.

And this thread, I'll guide you upgrade your H815 Locked-Bootloader to the v29A.

oh.. okay, I almost forgot the important thing

Code:

#include <std_disclaimer.h>

/*
 * Your warranty is now void.
 *
 * We are not responsible for bricked devices, dead SD cards,
 * thermonuclear war, or you getting fired because the alarm app failed. Please
 * do some research if you have any concerns about features included in this ROM
 * before flashing it! YOU are choosing to make these modifications, and if
 * you point the finger at us for messing up your device, we will laugh at you.
 *
 */

Important information:
Only tested on LG G4 H815-TWN ver.
I'm not responsible for other G4 variants (exclude H818P and H815)
Before flashing it to another variant G4, you must take upon oneself the consequences

AND WARNING! IF YOU HAVE ANY PROBLEM, PLZ SEARCH IN THIS FORUM OR GOOGLE!!!

Notice: If you need a Traditional Chinese Guide (中文教學)? Go here or here

This GUIDE use OFFICIAL FIRMWARE by LG, and there's new 7.0 TOT released, can be easily to-do, search it by yourself in G4 forum

Prepare these:
1. ~~A heart full of determination~~ <- Go play Undertale
2. LG Mobile Driver for Windows
3. LGUP with 8994 DLL
4. LG ADB pack (which include Send_Command.exe)
5. FlashFire v6.0 (the lastest version on Play Store will fc in 5.1)
6. LG Poland Official H815 v29A firmware zip
7. LG Taiwan H815 v10F KDZ
8. a rooted system.img of H815 v10F

Unnecessary:

Installation:
We need to downgrade 6.0 to 5.1 before flash Nougat
1. Check Anti-rollback version in *#546368#*815# -> SVC Menu -> Version Info (Important!!!)
If the value is 0, fine, goto step 2
If the value is v1, v2, v3 or above, DON'T USE THIS GUIDE OR BRICK YOUR PHONE
2. Install LGUP and Driver, shutdown your phone, goto Download mode by press Vol-UP, connect to your pc
You should see Firmware Update shows up on your screen
3. Open LGUP, select REFURBISH, and choose BIN file "H81510F_00_0113.kdz", press Start button

Code:

On the LGUP you first need to select : 
1. UPGRADE
2. Choose the .kdz file
3. Go back to REFURBISH 
4. Start ( Begin the flashing of the device ).

( thanks @lekk for these missing guide :) )

4. When rebooted, do a simple set, and go to Setting -> Backup & reset -> Factory data reset
Reboot again, do a simple set, copy rootsystem20160214.img & eu.chainfire.flash.v6.apk & LG-H815_Official_v29A.zip to internal storage
5. Shutdown and goto Download mode again, open LG ADB pack, double ports.bat , you should see\Device\XXXXDIAG1 REG_SZ COM#
The # is a random number, remember it, we'll use that at next step
6. Open cmd and change to same folder, type

Code:

Send_Command.exe \\.\COM#

"#" is the number what we just seen in ports.bat
You should see Enter, Leave and a #, copy

Code:

dd if=/data/media/0/rootsystem20160214.img bs=8192 seek=55296 count=529920 of=/dev/block/mmcblk0

then press enter
Wait a while, another # will appear, pull out battert and reboot

We finally downgrade to 5.1 with root, and now we gonna flash Nougat

7. Now you should see SuperSU in your app drawer, install eu.chainfire.flash.v6.apk, then open FlashFire
8. In FlashFire, click "+", click Flash ZIP or OTA, choose LG-H815_Official_v29A.zip, and don't tick anything, go next step
9. Scroll to the bottom, click FLASH, click OK, wait till the phone reboot to FlashFire mode
10. When the phone reboot again, you should now see Android is Upgrading
11. Goto Setting -> Backup & reset -> Factory data reset, do a full factory reset
12. Wait the phone earse and reboot itself
13. Open LG Backup, mount your SD Card, select Restore, and enjoy your new nougat 7.0

ling751am · Oct 7, 2017

Before asking any question, be sure you have already checked this Q&A list!

Known Issues:

Screenshots:
See attach

techops · Oct 8, 2017

The method is working fine for international H815. Freshly updated

JeremyChen · Oct 8, 2017

Thank you bro!!!

Velkyrix · Oct 8, 2017

Kinda sad that it voids your warranty tho.
That is legit the only thing that makes the fact we cant unlock our bootloader a good thing- whoever has a warranty keeps it.

ling751am · Oct 8, 2017

Velkyrix said:
Kinda sad that it voids your warranty tho.
That is legit the only thing that makes the fact we cant unlock our bootloader a good thing- whoever has a warranty keeps it.

Is there any brand new G4 on sale?
Or some countries give customers who buy G4 for 2 yrs warrenty?

Velkyrix · Oct 8, 2017

ling751am said:
Is there any brand new G4 on sale?
Or some countries give customers who buy G4 for 2 yrs warrenty?

at least here in Israel, all G4s are sold with a 2 year warranty.
Honestly if it didn't have the warranty I'd use this, but I do want to keep my warranty. It's kinda odd how this does void your warranty, and another bootloader locked rom that i know doesn't void your warranty. I assume it has to do with the fact that the method of flashing this rom does require root.

Desarth · Oct 8, 2017

Hey, thanks for the guide.. Will give it a try immediately. Was waiting for this for a long time.
Can we use this method to flash LineageOS Nougat or Oreo as well or does it only work with stock LG firmware?

ling751am · Oct 9, 2017

Velkyrix said:
at least here in Israel, all G4s are sold with a 2 year warranty.
Honestly if it didn't have the warranty I'd use this, but I do want to keep my warranty. It's kinda odd how this does void your warranty, and another bootloader locked rom that i know doesn't void your warranty. I assume it has to do with the fact that the method of flashing this rom does require root.

This is a fully stock ROM, downgrade to 5.1 no need to unlock the bootloader, we are using the bootloader's bug to flash modified system.img, and then, upgrade to nougat, a fully stock Nougat ROM, you can't root, and the bootloader still locked.
But I don't know what if we flash this, the phone still in warranty or not.

And here, in Taiwan, Taiwan LG is selling LG G6 now, they don't sell G4, our warranty only 1 yr.

Desarth said:
Hey, thanks for the guide.. Will give it a try immediately. Was waiting for this for a long time.
Can we use this method to flash LineageOS Nougat or Oreo as well or does it only work with stock LG firmware?

This method only works with stock ROM, if you try to flash a third-party ROM, you'll stuck at LG Logo cuz the bootloader don't know what the fxxk is this system, See "Known Issues" Q7

javikore · Oct 9, 2017

After updating to the V29a lift LG backup stop working notifications restore 2 times the two failed, I had to perform wipe and returned to normal.
Do we have root to delete apps that I do not use LG?

ling751am · Oct 9, 2017

javikore said:
After updating to the V29a lift LG backup stop working notifications restore 2 times the two failed, I had to perform wipe and returned to normal.
Do we have root to delete apps that I do not use LG?

Do you perform a fully factory reset after upgraded to Nougat? I think you must read my guide again

Do we have root? Plz see "Known Issues" Q6, ty

sbuja · Oct 9, 2017

when i run ports.bat i get this:
\Device\LGANDNETMDM0 REG_SZ COM4
\Device\LGANDNETDIAG1 REG_SZ COM3

so i copy the code and instead of COM# i put COM3. I then see ENTER, Leave then #, and then i copy the next code and press enter. The # appears and I remove the battery and reboot. Then there is no Supersu. What am i doing wrong?

shuryak · Oct 10, 2017

LG Taiwan H815 v10F KDZ link expired. Can u upload again?
Nevermind... i made a yandex account.

Engelm · Oct 10, 2017

sbuja said:
when i run ports.bat i get this:
\Device\LGANDNETMDM0 REG_SZ COM4
\Device\LGANDNETDIAG1 REG_SZ COM3

so i copy the code and instead of COM# i put COM3. I then see ENTER, Leave then #, and then i copy the next code and press enter. The # appears and I remove the battery and reboot. Then there is no Supersu. What am i doing wrong?

The com port was the one you need.
Can you copy the full input/output and paste it here?
Or a screenshot

sbuja · Oct 10, 2017

Thank you. The problem was i had to unpack the 7z file, then unpack the .tar file to get the the .img file. Now it is sorted, my phone is running Android 7.

Lonelylighttt · Oct 10, 2017

I have lg g4 h815tr and i want to try this. Its ok?

LG-H815 cihazımdan Tapatalk kullanılarak gönderildi

ling751am · Oct 10, 2017

sbuja said:
when i run ports.bat i get this:
\Device\LGANDNETMDM0 REG_SZ COM4
\Device\LGANDNETDIAG1 REG_SZ COM3

so i copy the code and instead of COM# i put COM3. I then see ENTER, Leave then #, and then i copy the next code and press enter. The # appears and I remove the battery and reboot. Then there is no Supersu. What am i doing wrong?

Plz upload your cmd window screenshot here

sbuja said:
Thank you. The problem was i had to unpack the 7z file, then unpack the .tar file to get the the .img file. Now it is sorted, my phone is running Android 7.

You got it.

Lonelylighttt said:
I have lg g4 h815tr and i want to try this. Its ok?

LG-H815 cihazımdan Tapatalk kullanılarak gönderildi

Don't do that if you don't have any confidence
But you can try this guide if you find a 5.1 version KDZ for your H815TR.
If you bricked your phone, try to flash back to stock KDZ
Good luck!

Lonelylighttt · Oct 10, 2017

ling751am said:
Plz upload your cmd window screenshot here

You got it.

Don't do that if you don't have any confidence
But you can try this guide if you find a 5.1 version KDZ for your H815TR.
If you bricked your phone, try to flash back to stock KDZ
Good luck!

The kdz file in this threath is work for me? Is it work for me ?

LG-H815 cihazımdan Tapatalk kullanılarak gönderildi

Sasimanto · Oct 10, 2017

I have added screenshots of my software info.i got the phone as a gift and it was rooted when i got it . i think it's refurbished phone. Will this method work for me?

ling751am · Oct 10, 2017

Lonelylighttt said:
The kdz file in this threath is work for me? Is it work for me ?

LG-H815 cihazımdan Tapatalk kullanılarak gönderildi

Is H815=H815TR? I don't get it

Don't try to upgrade your phone with this guide, never.
I think you better stay at Marshmallow

Sasimanto said:
I have added screenshots of my software info.i got the phone as a gift and it was rooted when i got it . i think it's refurbished phone. Will this method work for me?

Plz upload "Hardware Info" screenshot here, not "Software Info"
Don't forget to remove your MAC Address from screenshot

[GUIDE] Upgrade H815 Locked-BootLoader to Official Android 7.0 v29A

Senior Member

Senior Member

Attachments

Senior Member

Attachments

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Member

Senior Member

New member

Member

Senior Member

New member

Member

Senior Member

Member

Member

Attachments

Senior Member

Similar threads

Top Liked Posts