I want to install custom ROM to my LG G4 H815. But I cant unlock the bootloader as LG only support EU version of it, and mine is Singapore version. What do I do? I cant find any resources online, most of them are only about rooting the phone without unlocking bootloader, but what I want is to try different ROMs.
I seam to allways get stuck on "< waiting for any device >" after running the "fastboot oem device-id" command.
I have installed the LG drivers linked in the original post. I also tried the latest drivers from LGs support page.
I'm using a usb 2.0 port and an original usb cable.
I have tried adb and fastboot through android studio, sdkmanager as well as Minimal adb.
What else can i try?
Edit:
I have H815 model.
I tried on my laptop too. Same problem there. Both my machines are running up to date Windows 7.
When the phone is in fastboot mode running "fastboot devices" returns no results. The phone can also only be restarted by pulling the battery. There is an instruction on screen that says to hold the power button for 10 seconds. But that does not work.
When in fastboot mode Windows device manager lists the devce as "Android" and there are no drivers loaded for it.
I have tried to factory reset the phone.
Solution: I downloaded the Google USB Drivers. Then i manually picked the "LGE Mobile Sonner Single ADB Interface" driver for my Android device. When i did that fastboot immediately delivered my Device-id. I have no clue if this really is the correct driver for my device though.
I'm unsure if this driver might have poped up in the list as a result of me installing "LG Mobile support tool".
I have installed the LG drivers linked in the original post. I also tried the latest drivers from LGs support page.
I'm using a usb 2.0 port and an original usb cable.
I have tried adb and fastboot through android studio, sdkmanager as well as Minimal adb.
What else can i try?
Edit:
I have H815 model.
I tried on my laptop too. Same problem there. Both my machines are running up to date Windows 7.
When the phone is in fastboot mode running "fastboot devices" returns no results. The phone can also only be restarted by pulling the battery. There is an instruction on screen that says to hold the power button for 10 seconds. But that does not work.
When in fastboot mode Windows device manager lists the devce as "Android" and there are no drivers loaded for it.
I have tried to factory reset the phone.
Solution: I downloaded the Google USB Drivers. Then i manually picked the "LGE Mobile Sonner Single ADB Interface" driver for my Android device. When i did that fastboot immediately delivered my Device-id. I have no clue if this really is the correct driver for my device though.
I'm unsure if this driver might have poped up in the list as a result of me installing "LG Mobile support tool".
Last edited:
sorry if this has been asked a thousand times but, will this BL unlock method work on H815 INT running v20g firmware?
i've not been around these parts for some time, so i'm very rusty! my aim is to run stock MM but rooted with superSU+TWRP so i can A. get rid of ads B. keep stock camera (unless custom roms have equivalent cams now?) and C. keep regular backups in case of bootloop (have had mobo replaced once, but still don't trust it!)
is this do-able without losing my current setup - OS, apps, settings etc etc? or must i first flash 5.1 KDZ using LGUP and lose everything. apologies, i'm getting a little long in the tooth for weekly flashing and re-jigging everything!
i've not been around these parts for some time, so i'm very rusty! my aim is to run stock MM but rooted with superSU+TWRP so i can A. get rid of ads B. keep stock camera (unless custom roms have equivalent cams now?) and C. keep regular backups in case of bootloop (have had mobo replaced once, but still don't trust it!)
is this do-able without losing my current setup - OS, apps, settings etc etc? or must i first flash 5.1 KDZ using LGUP and lose everything. apologies, i'm getting a little long in the tooth for weekly flashing and re-jigging everything!
kouzelnik3
Senior Member
Yes, this method works on H815 INT v20g firmware. I have done it on my own H815 running this firmware version.
Everything you want is possible as well (root, TWRP, backups,...)
And your last question - if you want to unlock the bootloader, you will lose all your data in internal storage like apps, settings etc. But if you backup these stuff for expample using LG backup, you will get your data back. And google can do part of your restoring process too. So don't worry too much, you data will be fairly quickly back.
thanks bud. just to be sure; so you're saying the bootloader unlock method works on my current v20g (plus installing twrp/supersu etc)? Or, must i roll back to 5.0/5.1 first, unlock bootloader, then flash v20g again?
cheers
kouzelnik3
Senior Member
No problem
Yes, bootloader unlock works on your current v20g (and installing twrp, supersu,...). When I was doing this for the first time, I was on v20g as well and it worked. So you don't have to roll back to lollipop.
No problem
Yes, bootloader unlock works on your current v20g (and installing twrp, supersu,...). When I was doing this for the first time, I was on v20g as well and it worked. So you don't have to roll back to lollipop.
cool, cheers for the help
I need some help with backing up the stock ROM.
My goal is to have a backup of the stock ROM with the stock recovery without root.
It is the H815 model with an unlocked bootloader. I booted into TWRP without flashing it as suggested in the OP. I told it to keep the /system read only, then I selected everything and asked it to create a backup.
It ended up failing. Looking at the logs (linked below) makes believe it's some kind of a permission issue.
https://zerobin.net/?2b4bbdf83ce9384d#1kgZOPaqEzSQlgZKLcE1hsDVWI3SsYR35Z4cjkvsV6Y=
Can the stock ROM be successfully backed up like this?
PS: I'm kinda pissed that stuff like XDA attachments and Pastebin don't handle anything larger than half a megabyte.
My goal is to have a backup of the stock ROM with the stock recovery without root.
It is the H815 model with an unlocked bootloader. I booted into TWRP without flashing it as suggested in the OP. I told it to keep the /system read only, then I selected everything and asked it to create a backup.
It ended up failing. Looking at the logs (linked below) makes believe it's some kind of a permission issue.
https://zerobin.net/?2b4bbdf83ce9384d#1kgZOPaqEzSQlgZKLcE1hsDVWI3SsYR35Z4cjkvsV6Y=
Can the stock ROM be successfully backed up like this?
PS: I'm kinda pissed that stuff like XDA attachments and Pastebin don't handle anything larger than half a megabyte.
You should really use the official TWRP thread for TWRP questions.
The issue you have is:
Backing up System Image... I:Reading '/dev/block/mmcblk0p47', writing '/external_sd/TWRP/BACKUPS/LGH8154e574934/2017-06-30--13-11-37_MRA58K/system_image.emmc.win' I:TWFunc::Set_Brightness: Setting brightness control to 162 Truncating string cache entries. Truncating string cache entries. Truncating string cache entries. I:TWFunc::Set_Brightness: Setting brightness control to 5 I:TWFunc::Set_Brightness: Setting brightness control to 0 I:Error writing destination fd (No such file or directory) Backup Failed. Cleaning Backup Folder.
Ok so now read this:
https://xdaforums.com/g4/development/recovery-twrp-3-touch-recovery-t3442424/post72784930
.
Sent from my LG-H815 using XDA Labs
Sorry about that. I thought the issue was more related to the stock ROM itself and not the backup, this is why I asked here.
who can help me with the twrp link is not working please. hope i can use it on my h815 20k?
---------- Post added at 01:25 PM ---------- Previous post was at 12:47 PM ----------
C:\adb>adb reboot bootloader
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
error: device unauthorized. Please check the confirmation dialog on your device.
C:\adb>adb reboot bootloader
C:\adb>fastboot boot twrp-3.0.2-0-h815.img
cannot load 'twrp-3.0.2-0-h815.img': No such file or directory
C:\adb>
please what i my doing wrong?
---------- Post added at 01:28 PM ---------- Previous post was at 01:25 PM ----------
who can me out plsssssss in thidùs thread
---------- Post added at 01:28 PM ---------- Previous post was at 01:28 PM ----------
who can help me on this thread plsssssss
---------- Post added at 01:40 PM ---------- Previous post was at 01:28 PM ----------
i try this still the same problem
C:\adb>adb reboot bootloader
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
error: device unauthorized. Please check the confirmation dialog on your device.
C:\adb>adb reboot bootloader
C:\adb>fastboot boot twrp-3.0.2-0-h815.img
cannot load 'twrp-3.0.2-0-h815.img': No such file or directory
C:\adb>fastboot flash recovery twrp-3.0.2-0-h815.img
error: cannot load 'twrp-3.0.2-0-h815.img'
C:\adb>
---------- Post added at 02:01 PM ---------- Previous post was at 01:40 PM ----------
in case any body to help me am using lg h815 20k and my bootloader is unluck
---------- Post added at 01:25 PM ---------- Previous post was at 12:47 PM ----------
C:\adb>adb reboot bootloader
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
error: device unauthorized. Please check the confirmation dialog on your device.
C:\adb>adb reboot bootloader
C:\adb>fastboot boot twrp-3.0.2-0-h815.img
cannot load 'twrp-3.0.2-0-h815.img': No such file or directory
C:\adb>
please what i my doing wrong?
---------- Post added at 01:28 PM ---------- Previous post was at 01:25 PM ----------
who can me out plsssssss in thidùs thread
---------- Post added at 01:28 PM ---------- Previous post was at 01:28 PM ----------
who can help me on this thread plsssssss
---------- Post added at 01:40 PM ---------- Previous post was at 01:28 PM ----------
i try this still the same problem
C:\adb>adb reboot bootloader
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
error: device unauthorized. Please check the confirmation dialog on your device.
C:\adb>adb reboot bootloader
C:\adb>fastboot boot twrp-3.0.2-0-h815.img
cannot load 'twrp-3.0.2-0-h815.img': No such file or directory
C:\adb>fastboot flash recovery twrp-3.0.2-0-h815.img
error: cannot load 'twrp-3.0.2-0-h815.img'
C:\adb>
---------- Post added at 02:01 PM ---------- Previous post was at 01:40 PM ----------
in case any body to help me am using lg h815 20k and my bootloader is unluck
Starting Unlocking the Bootloader DOESNT WORK
Hello Dear Members,
I will tell you honestley I looked all over the LG G4 forum before posting.
I registered an account on the Link provided and when I get to the starting unlock the bootloader botton it just keep redirecting me to the sign in page and nothing happens.
I am getting really frustrated as I didnt find anybody discussion such issue.
How the F, should I get my unlock.bin file? I registered 3 E-Mail adresses and nothing.
Please help.
Thank you very much in advanced.
Hello Dear Members,
I will tell you honestley I looked all over the LG G4 forum before posting.
I registered an account on the Link provided and when I get to the starting unlock the bootloader botton it just keep redirecting me to the sign in page and nothing happens.
I am getting really frustrated as I didnt find anybody discussion such issue.
How the F, should I get my unlock.bin file? I registered 3 E-Mail adresses and nothing.
Please help.
Thank you very much in advanced.
ok let me try it now thx
---------- Post added at 09:34 AM ---------- Previous post was at 09:07 AM ----------
i get that the same problem before when i want to unlock my bootloader on the LG site, but i use internet explore browser to access LG site and it work for me so try it too
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I recently went through all of this and it took me quite a while to dig through dozens of threads so I decided to make a new one bringing all of these great things together specifically for the H815. Brace yourselves for the Android right of passage...
LG G4 H815 Marshmallow 6.0 Guide.
1. Unlock the Bootloader
2. Install the custom recovery: TWRP
3. Root
4. Install Xposed
5. Install Viper4Android
6. Unbrick Guide
7. Debloat
8. Battery Optimisations
- Quicklinks:
- Drivers: http://oceanhost.eu/e4h2px4e0hkd/LGMobileDriver_WHQL_Ver_4.0.4.exe.htm
- Minimal ADB: https://www.androidfilehost.com/?fid=24521665358595410
- LG Bootloader Unlock: https://developer.lge.com/resource/mobile/RetrieveBootloader.dev?categoryTypeCode=ANRS
- TWRP: https://xdaforums.com/attachment.php?attachmentid=4387389&d=1515789045
- SuperSU: https://www.androidfilehost.com/?fid=24369303960690845
- System Image Complete: http://xdaforums.com/g4/development/stock-h815-20g-images-kdz-flashable-t3450503
- Xposed Framework: http://xdaforums.com/attachment.php?attachmentid=3848457&d=1471691646
- Xposed Installer App: http://xdaforums.com/showthread.php?t=3034811
- Viper4Android: https://www.dropbox.com/s/lvcxffdqimbi78b/V4A_Poweramp_Lollipop_v3.zip?dl=0
- SELinux Mode Changer App: http://xdaforums.com/devdb/project/dl/?id=12506
- LG Bridge Unbrick Tool: http://www.lg.com/us/support/product-help/CT10000025-1438110404543-preinstall-apps
IMPORTANT | IMPORTANT | IMPORTANT | IMPORTANT | IMPORTANT
Backup any personal files because everything will be deleted! Make sure you have at least 50% battery remaining.
1. Unlocking the bootloader officially
This is the first step in voiding your warranty so is the point of no return. I've read in some places that you may be able to do this without voiding your warranty but I did not look into this.
2. Installing TWRP Custom Recovery
This will install a custom recovery allowing you to make backups and flash zip files.
3. Root
By now, you should have an unlocked bootloader and a custom recovery installed.
4. Installing Xposed
5. Installing Viper4Android (this breaks FM radio!)
Once all this is done and you're happy. It would be a good idea to enter recovery and make a full backup so that you can restore to the clean rooted state.
6. Unbrick Guide
7. Debloat
8. Battery Optimisations
Please note that this is my first thread and I'm not a developer. I hope the instructions are as complete and accurate as possible and they are what I followed for my H815 602. If there are any things I forgot or updates, please do let me know.3
Oreo version will make no difference.
By the sound of things you are flashing twrp --> rebooting to the os --> then using adb to reboot to recovery. Correct?
If so, then your LG software is overwriting the custom recovery as it has not been patched.
So...how to fix it?
1) reboot to bootloader and flash twrp as before
2) Get your fingers on the power and volume down buttons
3) Type fastboot reboot. When you press enter (initiating the reboot), press and hold the power and volume down buttons.
4) When the device shows the lg logo, release ONLY the power button and then immediately press it back down again
5) Keep holding until it asks if you would like to factory reset. (make sure you have a backup in case this goes wrong but if you have done this properly it shouldn't actually factory reset)
6) Select yes twice. It should now boot into twrp
7) Allow system modifications - this patches your os so twrp will not be wiped
8) Enjoy3I seam to allways get stuck on "< waiting for any device >" after running the "fastboot oem device-id" command.
I have installed the LG drivers linked in the original post. I also tried the latest drivers from LGs support page.
I'm using a usb 2.0 port and an original usb cable.
I have tried adb and fastboot through android studio, sdkmanager as well as Minimal adb.
What else can i try?
Edit:
I have H815 model.
I tried on my laptop too. Same problem there. Both my machines are running up to date Windows 7.
When the phone is in fastboot mode running "fastboot devices" returns no results. The phone can also only be restarted by pulling the battery. There is an instruction on screen that says to hold the power button for 10 seconds. But that does not work.
When in fastboot mode Windows device manager lists the devce as "Android" and there are no drivers loaded for it.
I have tried to factory reset the phone.
Solution: I downloaded the Google USB Drivers. Then i manually picked the "LGE Mobile Sonner Single ADB Interface" driver for my Android device. When i did that fastboot immediately delivered my Device-id. I have no clue if this really is the correct driver for my device though.
I'm unsure if this driver might have poped up in the list as a result of me installing "LG Mobile support tool".
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