Develop Bugs

Can H811 Bootloader Be Re-Locked?

I'm stuck and confused:
Had a Nexus 4 and 5 for years. Decided to upgrade this past November to the LG G4 (T-Mobile H811)
Got it to root without touching the boot loader.
In came MM and then I had issues of repeating the process.
I came across a solution, to unlock my bootloader. So I did it and managed to get my G4 rooted while running stock LG MM (H81120i).
Everything was running well for several months, but then I started to see erratic behavior. It would heat-up in my pocket for no reason. It would not save pictures. Connections via WiFi and LTE were breaking up. All in all, I wasn't happy and I missed the stock Google interface.
So I've decided to install CM13. Had many issues of getting it to work for several days, which included persistent closings of Google Play services (and many others) and not being able to make/receive calls (it would automatically reboot) After several different attempts, I managed to get it all working. Cleared/Wiped everything off my internal drive, installed the "LG-H81120i-Flashable.COMPLETE" and "cm-13.0-201605xx-NIGHTLY-h811" and "open_gapps-arm64-6.0-nano-201605xx", all back to back. And then installed manual everything as needed Gmail, Maps, etc.
Everything worked great for about 2-days, until then next morning my screen locked up. Then the phone rebooted. After the reboot, it lasted for about 10-15 seconds in CM13 and rebooted again manually. Continued to reboot over and over, till it then stopped booting with CM13. I thought that maybe I needed to install the latest CM13 zip file, but found I couldn't get into recovery. The first reboot screen, showing "Bootloader State: Bootloader unlocked? and the LG logo would be in a loop. During that time, I could feel the phone getting hotter and hotter.
Sometimes, the phone would boot up into CM fully and last for 5 to 10 minutes. Then reboot again and stay in the first reboot screen.
I managed to get into TWRP recovery and thought that putting back the stock MRA58K image would help. During the install in recovery, the phone rebooted! I never thought it could do that. Eventually I got the stock LG back-up up and running, but it didn’t help, and same rebooting occurred.
I'm stuck and out of options. I would like to get the phone BACK TO STOCK and then perform an RMA. I’m afraid that with the BOOTLOADER UNLOCKED that my RMA will be denied and I’m stuck with what I have.
So can the H811's bootloader be re-locked?

PiCASSiMO said:
I'm stuck and confused:
Had a Nexus 4 and 5 for years. Decided to upgrade this past November to the LG G4 (T-Mobile H811)
Got it to root without touching the boot loader.
In came MM and then I had issues of repeating the process.
I came across a solution, to unlock my bootloader. So I did it and managed to get my G4 rooted while running stock LG MM (H81120i).
Everything was running well for several months, but then I started to see erratic behavior. It would heat-up in my pocket for no reason. It would not save pictures. Connections via WiFi and LTE were breaking up. All in all, I wasn't happy and I missed the stock Google interface.
So I've decided to install CM13. Had many issues of getting it to work for several days, which included persistent closings of Google Play services (and many others) and not being able to make/receive calls (it would automatically reboot) After several different attempts, I managed to get it all working. Cleared/Wiped everything off my internal drive, installed the "LG-H81120i-Flashable.COMPLETE" and "cm-13.0-201605xx-NIGHTLY-h811" and "open_gapps-arm64-6.0-nano-201605xx", all back to back. And then installed manual everything as needed Gmail, Maps, etc.
Everything worked great for about 2-days, until then next morning my screen locked up. Then the phone rebooted. After the reboot, it lasted for about 10-15 seconds in CM13 and rebooted again manually. Continued to reboot over and over, till it then stopped booting with CM13. I thought that maybe I needed to install the latest CM13 zip file, but found I couldn't get into recovery. The first reboot screen, showing "Bootloader State: Bootloader unlocked? and the LG logo would be in a loop. During that time, I could feel the phone getting hotter and hotter.
Sometimes, the phone would boot up into CM fully and last for 5 to 10 minutes. Then reboot again and stay in the first reboot screen.
I managed to get into TWRP recovery and thought that putting back the stock MRA58K image would help. During the install in recovery, the phone rebooted! I never thought it could do that. Eventually I got the stock LG back-up up and running, but it didn’t help, and same rebooting occurred.
I'm stuck and out of options. I would like to get the phone BACK TO STOCK and then perform an RMA. I’m afraid that with the BOOTLOADER UNLOCKED that my RMA will be denied and I’m stuck with what I have.
So can the H811's bootloader be re-locked?
Click to expand...
Click to collapse
Since you live in the US your only option is to apply over voltage to the battery terminal and burn the mobo so that it wont even boot up. The exact method is somewhere around here in xda so you should look it up since you have no other choice
Edit: To answer your question: No

sirsomething said:
Since you live in the US your only option is to apply over voltage to the battery terminal and burn the mobo so that it wont even boot up. The exact method is somewhere around here in xda so you should look it up since you have no other choice
Edit: To answer your question: No
Click to expand...
Click to collapse
If I can't re-lock the bootloader, has anyone had the success of returning their phones under warranty? Through T-Mobile?

[REQ] Help: bootloop after 7.1.1 beta OTA and cannot enter recovery mode

I've been watching several threads for the last few days, and have not seen this exact issue. I would greatly appreciate some help.
Device:
- Nexus 5X LGH790 32GB
- Stock bootloader / fastboot
- Never unlocked / rooted / etc.
The only advanced thing I've done is join the beta program a few months ago to get 7.0 early. Got that without any issue.
Issue:
I received the 7.1.1 OTA on the day it came out. Installed with no problems. The next day, the phone just froze in the middle of regular use. After about 15 seconds, it started boot looping to the Google splash screen. I can hold volume-down to enter fastboot, but when I select recovery mode, it just starts looping again. Pretty much all I could do was power it off. I did find out by accident that if I left it looping for long enough, sometimes it actually loaded normally (I even saw beta program warning/notice). But when I tried using it for more than a minute, it would freeze, reboot, and loop again.
What I've already tried:
- I tried using the WugFresh NRT fix softbrick method. I was able to quickly turn on debugging one of the times that I left it to loop. But when NRT sent a reboot the phone, it threw it back into the loop and NRT stopped recognizing the device.
- I tried to follow the unbrick procedure using a TOT file in this thread: http://forum.xda-developers.com/nexus-5x/help/tutorial-how-unbricked-nexus-5x-16gb-t3481766 But even after using LGUP, I still cannot even get into recovery mode.
- I filed a bug in the AOSP here: https://code.google.com/p/android/issues/detail?id=225802.
I'm at a loss here. On another thread, a member suggested this type of loop was a hardware/solder joint issue. I suppose that's possible... but man, what a coincidence that would be! Just now after the OTA the hardware fails? Any other thoughts? I'm pretty new to a lot of the terms/methods here, so maybe I missed something.
Thanks, DCK.

Update: I tried using LGUP again. The phone still gets stuck on the Google screen then boot loops.
Now, however, I am able to get into recovery mode consistently. Other threads have suggested doing an OTA sideload at this point. But I cannot seem to get my device recognized. The NRT shows no ADB devices connected. So I'm still stuck. Is there another way to try sideload?

DC_Knight said:
Update: I tried using LGUP again. The phone still gets stuck on the Google screen then boot loops.
Now, however, I am able to get into recovery mode consistently. Other threads have suggested doing an OTA sideload at this point. But I cannot seem to get my device recognized. The NRT shows no ADB devices connected. So I'm still stuck. Is there another way to try sideload?
Click to expand...
Click to collapse
Try fastboot/bootloader mode and fastboot flash the OTA manually.

Update 2: Seems like all the other things I tried over the last few days have caused various unofficial USB drivers to be installed. I've tried uninstalling most of them. I downloaded the google USB driver from latest SDK. But my 5X is still recognized as a Kedacom device when it is sitting at FastBoot.
However, I must have made some progress because I was able to start the sideload process. Unfortunately, I am now stuck on yet another error. The phone hangs at "verifying update package" and then after about 2 minutes... it reboots itself and starts looping again!
I thought I had it. So close. Now I want to throw the phone. Going to sleep, but would be grateful for any other suggestions in the morning.
- DCK

use nrt to erase all partitions, then download 7.1 factory image, unzip and flash one by one the partitions.

DC_Knight said:
...
I'm at a loss here. On another thread, a member suggested this type of loop was a hardware/solder joint issue. I suppose that's possible... but man, what a coincidence that would be! Just now after the OTA the hardware fails? Any other thoughts? I'm pretty new to a lot of the terms/methods here, so maybe I missed something.
Thanks, DCK.
Click to expand...
Click to collapse
Sounds like the boot loop issue many people have been having (the hardware/solder issue). It happened to me a few weeks ago after upgrading to Android 7.0. I got a replacement device from google.

If you're bootloader is locked, NRT or any other method to flash the factory image is not going to work. The only suggestion I have is to un-enroll in the beta program and hope your device will boot long enough to flash the ota Google will send the device to get back to 7.0. Note, this will wipe your device.
Sent from my Nexus 9 using XDA-Developers mobile app

Same problem here. It can't be recognized after I reboot to fastboot. So I can't flash anything.

If the device isn't recognized try this http://forum.xda-developers.com/showpost.php?p=69273414&postcount=33. It's worked for a few of us with the same problem
Sent from my Nexus 9 using XDA-Developers mobile app

Enter stock recovery then flash the full ota via adb sideload

Boot Looping Help Please

I purchased a 5x for my wife so she can get on Project Fi. They said it was stuck boot looping, thinking I could solve the problem.
Here are the basics.
-Yes, I can get into boot loader (the menu of start, recovery, etc), but I can't get into TWRP. Tried flashing TWRP a few times and nothing. SkipSoft recognizes that its installed though.
-After bootlooping for awhile, it will load normally and work fine. However it wants to update to the newest version of android. I run the ota and back to bootlooping. It will show the android dude and say "error". Will eventually start bootlooping and then boot normally.
-I have flashed different stock versions. I tried the newest, the second to newest and the last M available. All will flash but continue the bootlooping.
Bootlooping can be anywhere from 1 minute to 10+.
The device will also first display something like, "Your device software can't be checked for corruptions. Please lock the bootloader"
But it'll show up whether the bootloader is locked or not.
The phone will freeze at some point. Whether right away or after 5 minutes. It freezes and then restarts and goes through the bootloop again.
So what else can/should I do? I've never dealt with Kernels but wondering if the last owner did something to them. Is there a way to flash stock kernels just incase or is this done when I flash a Google Factory Stock Image?
Would flashing a non-stock rom be a good idea?
Thanks

So I tried sideloading. I was able to get into the stock recovery. I tried wiping cache and data, then tried installing the newest stock rom.
Everything seemed to work. Then I had to restart. A message popped up after the same "Your device software can't be checked for corruptions. Please lock the bootloader". It had the title in blue stating "Encryption unsuccessful".
Then said, "Encryption was interrupted and can't complete. As a result, the data on your phone is no longer accessible. To resume using your phone you need to perform a factory reset. When you set up your phone after the reset, you'll have an opportunity to restore any data that was backed up to your Google Account."
Then there is a single button that says, "Reset Phone".
Problem still persists.
Help please...

Why did you bought a bootlooped phone?

Sin Stalker said:
I purchased a 5x for my wife so she can get on Project Fi. They said it was stuck boot looping, thinking I could solve the problem.
Here are the basics.
-Yes, I can get into boot loader (the menu of start, recovery, etc), but I can't get into TWRP. Tried flashing TWRP a few times and nothing. SkipSoft recognizes that its installed though.
-After bootlooping for awhile, it will load normally and work fine. However it wants to update to the newest version of android. I run the ota and back to bootlooping. It will show the android dude and say "error". Will eventually start bootlooping and then boot normally.
-I have flashed different stock versions. I tried the newest, the second to newest and the last M available. All will flash but continue the bootlooping.
Bootlooping can be anywhere from 1 minute to 10+.
The device will also first display something like, "Your device software can't be checked for corruptions. Please lock the bootloader"
But it'll show up whether the bootloader is locked or not.
The phone will freeze at some point. Whether right away or after 5 minutes. It freezes and then restarts and goes through the bootloop again.
So what else can/should I do? I've never dealt with Kernels but wondering if the last owner did something to them. Is there a way to flash stock kernels just incase or is this done when I flash a Google Factory Stock Image?
Would flashing a non-stock rom be a good idea?
Thanks
Click to expand...
Click to collapse
When my Nexus 5x got into bootloop, I sent it to LG and they had to change the whole circuit. So yeah.

When you flash Google Factory Image, it flash the stock kernel.
If you have warranty, then send it to Google/LG. If you haven't got, then you're in problem. New motherboard needed, but it's expensive.

See the following thread for more info.
https://forum.xda-developers.com/nexus-5x/help/5x-bootloop-cause-fix-t3476794/

khalifakk said:
Why did you bought a bootlooped phone?
Click to expand...
Click to collapse
Cause its cheaper.

Sin Stalker said:
Cause its cheaper.
Click to expand...
Click to collapse
Then face the consequences...

khalifakk said:
Then face the consequences...
Click to expand...
Click to collapse
What consequences?

Hardware bootloop can't be fix by software.

Duckscreen said:
Hardware bootloop can't be fix by software.
Click to expand...
Click to collapse
Exactly. Everyone has either been able to get a replacement under warranty or was pretty much screwed if it was out of warranty.
Sent from my Nexus 5X using Tapatalk

Sin Stalker said:
What consequences?
Click to expand...
Click to collapse
A bootlooped phone for ever....

I recommend you will install kernel adiutor app after try rooting
I recommend you will install kernel adiutor app after try rooting
Almost I got no bootloop even no random reboot nexus 5x's state

Unlocking the bootloader without access to the OS

My Nexus 5X just corrupted itself a couple days ago and unfortunately I did not enable OEM unlocking before that happened. I was running stock, un-rooted and from looking online the past couple days I see no way to unlock the bootloader so I can wipe everything and re-flash. I can get into fastboot, but not recovery mode. Recovery mode just says "No Command" with the little android on its side. I have tried all the fastboot commands that one would normally try and they all return some version of "device is locked" error messages. Is there any way at all to unlock the bootloader or flash stock, or otherwise get into recovery without checking that OEM unlocking option in the Developer Options of the OS? I don't care about my data, I just want to get my phone working again. It's out of warranty so I am willing to try anything to get it working again.

I'm in the same situation

This is why I always enable Oem unlocking on all devices I own regardless of security for things like this .

_Ghost said:
This is why I always enable Oem unlocking on all devices I own regardless of security for things like this .
Click to expand...
Click to collapse
Yeah, im going to be doing that from now on. I am pretty sure it was an OTA update that did it. It had just updated a day or two before. I was able to get into Recovery and sideload a different OTA update. The update failed and the phone rebooted, but it rebooted into Android. I was able to get my data off and all seems stable for now.

How did you fix it?!
coryrwest said:
Yeah, im going to be doing that from now on. I am pretty sure it was an OTA update that did it. It had just updated a day or two before. I was able to get into Recovery and sideload a different OTA update. The update failed and the phone rebooted, but it rebooted into Android. I was able to get my data off and all seems stable for now.
Click to expand...
Click to collapse
I am in this exact situation. Phone out of warranty, just want to get it back on, don't care about the data on it.. but the "device state" is locked. I can get it into recovery but the sideload fails, I think because the device is locked. How did you get your phone to work again??
I've tried following these instructions (I'm new and can't post a URL: [ttps://drive.google.com/file/d/0Bz6x7k-VkpUJam5Mc1hKa09PVGc/view) and it fails during step 19.
I've also tried these instructions (I can't post the URL but if you google this exact phrase, it's the first link: Nexus 5X Bootloop Fix - The Step-by-step DIY Guide - TechBii) but the phone is locked so I can't do it.
Help!

See this post please: https://forum.xda-developers.com/nexus-5x/general/petition-google-release-official-t3672987
Thanks

So did you ever get it to work or just thre the phone in the garbage, @coryrwest

See my latest post in the thread: https://forum.xda-developers.com/showpost.php?p=71241965&postcount=4

How?
coryrwest said:
Yeah, im going to be doing that from now on. I am pretty sure it was an OTA update that did it. It had just updated a day or two before. I was able to get into Recovery and sideload a different OTA update. The update failed and the phone rebooted, but it rebooted into Android. I was able to get my data off and all seems stable for now.
Click to expand...
Click to collapse
I'm having a similar issue, how did you exactly get it into recovery? Cause mine will simply keep rebooting if I select recovery mode from bootloader

Android 11 Beta 2 Stuck! HELP

Hey! Need a little help. I updated to Android 11 Beta 2. Now my phone is stuck on a boot loop. A li'l different though, phone boots up normally and stays on the lockscreen and alive. Can receive calls. But once I unlock with the pattern it shows ' Phone is starting' works for a good 2 seconds and then ends up on infinite bootloop until I Power down. How do I access my files on PC ? If I can get just few files out of it then maybe I can perform a factory reset . Please HELP!

kkrazzyyguy said:
Hey! Need a little help. I updated to Android 11 Beta 2. Now my phone is stuck on a boot loop. A li'l different though, phone boots up normally and stays on the lockscreen and alive. Can receive calls. But once I unlock with the pattern it shows ' Phone is starting' works for a good 2 seconds and then ends up on infinite bootloop until I Power down. How do I access my files on PC ? If I can get just few files out of it then maybe I can perform a factory reset . Please HELP!
Click to expand...
Click to collapse
some older app is causing the loop you mayneed to factory reset through recovery or flash factory images to ur devices ,( please backup your all data and i will advice you to remove the screen lock if possible as it may cause issues after flashing older or newer images

That's what I am asking. How do I backup?

kkrazzyyguy said:
That's what I am asking. How do I backup?
Click to expand...
Click to collapse
I use this tool in my computer to update my phone.
Make sure to follow and read the instructions.
Since you're phone is in boot loop, put your phone in into bootloader
https://flash.android.com/welcome?continue=/custom

Facing the same trouble, did it help?

Hi, I finally managed to solve this!! Was able to get the phone working with data intact.
So I got exactly the same problem yesterday and was looking around for a solution when I bumped on this thread, the solution suggested to use Android Flash Tool can work only if the bootloader is already unlocked, USB debugging is on and you edit the flash.bat file to remove -w from the command line, which would not work in my case since my bootloader is locked and unlocking through ADB would wipe all data
So the only good solution is to do an OTA UPDATE USING ADB SIDELOAD, I just downloaded the OTA file, connected the phone to computer, booted into recovery and used ADB to sideload the OTA and boom, the phone is its pristine self again, with ALL DATA intact