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LG K40 bootloader

General LG Android phones discussion, firmware, solution, root, help.
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jasmin811
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LG K40 bootloader

#1

Unread post by jasmin811 » Sun Dec 01, 2019 7:06 am

Hello everybody,
It is nice that this forum is back and keep the good work.
I have This phone lg k40 and what I want to ask how to unlock the bootloader?
When I tried to go to fastboot mode the phone just restart it and goes straight to system either with recovery also.
The commands "adb reboot bootloader" seems doesn't work and "adb reboot recovery"also.
I checked in lg bootloader page and i didn't found my phone in supported list for unlocking the bootloader.
So my question is there any other solution to unlock it?
Thank you forwardly for answers.


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Re: LG K40 bootloader

#2

Unread post by RomShillzz » Sun Dec 01, 2019 9:45 am

Make sure you have properly Installed ADB (https://www.youtube.com/watch?v=8w9yzudXH38) and LG Bridge in your PC, then Enable OEM Unlocking and USB Debugging in your device. After this, try the bootloader unlocking process and post results.

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jasmin811
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Re: LG K40 bootloader

#3

Unread post by jasmin811 » Mon Dec 02, 2019 8:56 am

I tried that allready,I don't have fastboot and recovery at all.


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Re: LG K40 bootloader

#4

Unread post by RomShillzz » Mon Dec 02, 2019 9:45 am

jasmin811 wrote:
Mon Dec 02, 2019 8:56 am
I tried that allready,I don't have fastboot and recovery at all.
Connect your device (USB Debugging Enabled), Go to C:\adb, Hold the Shift key and right click on any empty space inside the folder. Select Open command here or Open PowerShell command here (for other Windows version), when the adb command prompt comes up, type in the following commands below:

Code: Select all

adb devices
adb reboot bootloader
When the device boots to fastboot mode, enter the commands below:

Code: Select all

fastboot devices
fastboot oem unlock
fastboot reboot
P.S Hit the enter button after every command line.

Post results.

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Re: LG K40 bootloader

#5

Unread post by jasmin811 » Tue Dec 03, 2019 8:49 am

Hello,

As I wrote on first post I tried already those commands but the problem is I don't have fastboot mode.The bootloader is locked.
I need to unlock bootloader first.


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Re: LG K40 bootloader

#6

Unread post by RomShillzz » Tue Dec 03, 2019 9:02 am

jasmin811 wrote:
Tue Dec 03, 2019 8:49 am
Hello,

As I wrote on first post I tried already those commands but the problem is I don't have fastboot mode.The bootloader is locked.
I need to unlock bootloader first.
There is no way the bootloader can be unlocked if the device doesn't boot to fastboot. In that case, you need to manually boot the device into fastboot mode.

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Re: LG K40 bootloader

#7

Unread post by jasmin811 » Tue Dec 03, 2019 7:10 pm

Hello,thanks for fast reply,maybe I didn't wrote correctly.I don;t have fastboot mode even recovery mode also.
When i type the command "adb reboot bootloader" it just restart and goes to system.When i type "adb reboot recovery" it also restart and goes to system.I installed minimal adb drivers and lg bridge too and activated oem unlock and usb debug in dev. options.


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Re: LG K40 bootloader

#8

Unread post by RomShillzz » Tue Dec 03, 2019 7:51 pm

jasmin811 wrote:
Tue Dec 03, 2019 7:10 pm
Hello,thanks for fast reply,maybe I didn't wrote correctly.I don;t have fastboot mode even recovery mode also.
When i type the command "adb reboot bootloader" it just restart and goes to system.When i type "adb reboot recovery" it also restart and goes to system.I installed minimal adb drivers and lg bridge too and activated oem unlock and usb debug in dev. options.
Thank you for your feedback. I'll suggest you flash a new firmware to your device in other to fix an issue/bug, cause by default that device should boot into fastboot mode.

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