xda-developers LG Nexus 5X Nexus 5X Q&A, Help & Troubleshooting [REQ] Need help. Unbrick phones with locked bootloader, oem unlock disabled by bitdomo
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[REQ] Need help. Unbrick phones with locked bootloader, oem unlock disabled

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I have made some success with the help of @gee one providing me the necessary files needed for making tot file for both H790 and H791 32GB varaint Nexus 5X.
It was tested on @JaCh0o's bricked H791 32GB Nexus 5X
I am still waiting for somebody with a 16GB Nexus 5X to make me a dump of the Primary GPT (first 512 kb of the emmc) and the Backup GPT (last 512 kb of the emmc) to make tot file for the 16GB Nexus 5X too.
If sombody is in this situation please follow the guide.
  • Download TOT file for your device
  • Download LG usb drivers
  • Download LGUP tool
  • Download 8994 dll for LGUP
  • Install LG usb drivers
  • Install LGUP tool
  • Install 8994 dll for LGUP
  • Turn off your phone
  • Press and hold the volume_up key while you connect the phone to the PC with usb cable.
  • Wait for Windows to install the new drivers
  • Start LGUP
  • Either select refurbish (will wipe userdata) or upgrade (wont wipe userdata)
  • Click on the line where it says BIN file to make the button with "..." appear and click on it then select the tot file.

  • Click on start
This here is not important
I have a solution in my head for those who have locked their bootloader and disabled oem unlocking with a modified system and now they are stucked in bricked condition with their phones
To make this idea to a real solution I need some help from you guys as I dont have nexus 5x. My idea is enter to LG's download and flash a tot file for nexus 5x using lg flashtool. Since there are no leaked tot files for nexus 5x yet, so I will do one. I have dll file which will probably work for nexus 5x (90%).

First of all before I jump in head first to making a tot file, please let me know are you able to boot your nexus 5x to LG's download.
According to my sources to enter download mode you have to turn off your phone then plug the usb cable to the phone wile you keep pressing the volume_up key. If this key combination gets you into LG's download then it is great. To exit from LG's download just keep pressing the power key and the phone will shutdown. If it does not work then it is still possible to enter download mode but with using LG's 910kOhm usb cable.

The next things I need are dump files of Primary_GPT (first 512 kb of the emmc), misc partition (to see LG's version numbering for nexus 5X, it is important for tot files), laf partition and Backup_GPT (last 512 kb of the emmc). For GPTs I will need both the 32 gb and the 16 gb variants of the phone.
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18th November 2015, 02:18 PM |#2  
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Download mode does work with volume up. I'm not sure about the USB cable, but I did get into download mode several times while trying to "fix" my phone.

Think I have the other files for the 32gb variant as well, but I'm traveling right now.
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18th November 2015, 02:37 PM |#3  
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Boots into download mode. Shows up in Device Manager as USB serial on COM3.

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Click image for larger version Name: download_mode.png Views: 17844 Size: 53.9 KB ID: 3546792  
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18th November 2015, 03:17 PM |#4  
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Quote:
Originally Posted by Witek_M

Boots into download mode. Shows up in Device Manager as USB serial on COM3.

So the key combination have worked?
Do you see something like this on your screen?
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18th November 2015, 03:54 PM |#5  
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Quote:
Originally Posted by bitdomo

So the key combination have worked?
Do you see something like this on your screen?

Volume up while plugging USB cable worked. Yes, that is what I see on the screen.
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18th November 2015, 04:15 PM |#6  
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Quote:
Originally Posted by Witek_M

Volume up while plugging USB cable worked. Yes, that is what I see on the screen.

Great! We are one step ahead. Thanks.
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23rd November 2015, 08:22 AM |#7  
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Quote:
Originally Posted by bitdomo

Great! We are one step ahead. Thanks.

Also can confirm that phone is loading Download Mode.
I have locked oem after turning on OEM control in Developer Mode, then wiped by TWRP whole availible partitions and flashed stock recovery on it. Now got "clean" phone with no way to get working.
Here's my thread about that issue:
http://forum.xda-developers.com/nexu...t3249003/page2
What aprox time we gonna wait for stock tot files ?? I'm thinking about shipping phone to LG Service (would prefer to do it by myself) It's not my phone and the preson is pressing on me about that. Will your tot files makes phone tamper flag on? Is it possible to set in off back again ?
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23rd November 2015, 08:45 AM |#8  
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Quote:
Originally Posted by JaCh0o

Also can confirm that phone is loading Download Mode.
I have locked oem after turning on OEM control in Developer Mode, then wiped by TWRP whole availible partitions and flashed stock recovery on it. Now got "clean" phone with no way to get working.
Here's my thread about that issue:
http://forum.xda-developers.com/nexu...t3249003/page2
What aprox time we gonna wait for stock tot files ?? I'm thinking about shipping phone to LG Service (would prefer to do it by myself) It's not my phone and the preson is pressing on me about that. Will your tot files makes phone tamper flag on? Is it possible to set in off back again ?

I am done with the tot file for the 32gb variant, thanks to @gee one
I am still waiting for the 16 gb variant's primary gpt and backup gpt dump.
If you have the 32 gb variant we can give a try.

Lg flashtool never sets tamper flag on. For nexus 5 it locks the bootloader and resets the tamper flag.
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23rd November 2015, 11:58 AM |#9  
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Quote:
Originally Posted by bitdomo

I am done with the tot file for the 32gb variant, thanks to @gee one
I am still waiting for the 16 gb variant's primary gpt and backup gpt dump.
If you have the 32 gb variant we can give a try.

Lg flashtool never sets tamper flag on. For nexus 5 it locks the bootloader and resets the tamper flag.

Yes, I got 32gb version. Can I ask you for short instructions how to flash it properly and links to 32gb version files?

Wysłane z mojego Oppo Find 7 przy użyciu Taptalka
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23rd November 2015, 01:16 PM |#10  
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Quote:
Originally Posted by JaCh0o

Yes, I got 32gb version. Can I ask you for short instructions how to flash it properly and links to 32gb version files?

Wysłane z mojego Oppo Find 7 przy użyciu Taptalka

Download usb drivers
Download LG flashtool
Download dll file
Download H790 or H791 tot file for 32GB variant
Follow the steps in this video. I made this video for nexus 5, but everything is the same for nexus 5x too. Just use the the tot and the dll file I linked.

If you have the H791 variant can you check the device factory version? If you flashed the tot successfully you should see a LOG folder in the same directory as the dll file. You will find a .txt file in the LOG directory. Search for device factory version and paste it here. It is something like this: LGH790AT-00-V10f-NXS-XXX-OCT-03-2015-32G-MDA89E-US
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23rd November 2015, 02:42 PM |#11  
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Quote:
Originally Posted by bitdomo

Download usb drivers
Download LG flashtool
Download dll file
Download H790 or H791 tot file for 32GB variant
Follow the steps in this video. I made this video for nexus 5, but everything is the same for nexus 5x too. Just use the the tot and the dll file I linked.

If you have the H791 variant can you check the device factory version? If you flashed the tot successfully you should see a LOG folder in the same directory as the dll file. You will find a .txt file in the LOG directory. Search for device factory version and paste it here. It is something like this: LGH790AT-00-V10f-NXS-XXX-OCT-03-2015-32G-MDA89E-US

As I can see this example is for US. Im from Poland (Central Europe). There will be no problem with radio/modem brandwitdth ? Is this for every H791 32GB Nexus 5x ? This dll file looks to be for LG G4, is it ok ?
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