Install LineageOS on h850
Back to the overviewBasic requirements
- Make sure your computer has
adb
andfastboot
. Setup instructions can be found here. - Enable USB debugging on your device.
Unlocking the bootloader
- Visit LG’s official unlocking website, where you’ll be asked to login.
- Follow the instructions and get your unlock file.
- Connect your device to your PC via USB.
- On the computer, open a command prompt (on Windows) or terminal (on Linux or macOS) window, and type:
adb reboot bootloader
You can also boot into fastboot mode via a key combination:
- With the device powered off, hold Volume Up + Power.
- Once the device is in fastboot mode, verify your PC finds it by typing:
fastboot devices
Tip: If you seeno permissions fastboot
while on Linux or macOS, try runningfastboot
as root. - Now type the following command to unlock the bootloader:
fastboot flash unlock unlock.bin
Where
unlock.bin
is the bootloader unlock file you received in the email. - Wait for the bootloader unlocking process to complete. Once finished, you can check if bootloader is successfully unlocked by typing:
fastboot getvar unlocked
Verify that the response is
unlocked: yes
. In that case, you can now install third-party firmware. - Since the device resets completely, you will need to re-enable USB debugging to continue.
Installing a custom recovery using fastboot
-
Download a custom recovery - you can download Lineage Recovery. Simply download the latest recovery file, named something like
lineage-17.1-20210217-recovery-h850.img
. - Connect your device to your PC via USB.
- On the computer, open a command prompt (on Windows) or terminal (on Linux or macOS) window, and type:
adb reboot bootloader
You can also boot into fastboot mode via a key combination:
- With the device powered off, hold Volume Up + Power.
- Once the device is in fastboot mode, verify your PC finds it by typing:
fastboot devices
Tip: If you seeno permissions fastboot
while on Linux or macOS, try runningfastboot
as root. - Flash recovery onto your device:
fastboot flash recovery <recovery_filename>.img
Tip: The file may not be named identically to what stands in this command, so adjust accordingly.Tip: Some devices have buggy USB support while in bootloader mode, if you seefastboot
hanging with no output when using commands such asfastboot getvar ..
,fastboot boot ...
,fastboot flash ...
you may want to try a different USB port (preferably a USB Type-A 2.0 one) or a USB hub. - Now reboot into recovery to verify the installation:
- With the device powered off, hold Volume Down + Power until the LG logo appears, then release Power for a second and hold it again until the recovery comes up.
Installing LineageOS from recovery
- Download the LineageOS installation package that you would like to install or build the package yourself.
- Optionally, download an application package add-on such as Google Apps (use the
arm64
architecture).
- Optionally, download an application package add-on such as Google Apps (use the
- If you are not in recovery, reboot into recovery:
-
With the device powered off, hold Volume Down + Power until the LG logo appears, then release Power for a second and hold it again until the recovery comes up.
Note: Accept the factory reset prompt using the hardware buttons. If you have done everything correctly, this will not actually reset your device but instead will boot the custom recovery.
-
- Now tap Factory Reset, then Format data / factory reset and continue with the formatting process. This will remove encryption and delete all files stored in the internal storage, as well as format your cache partition (if you have one).
- Return to the main menu.
- Sideload the LineageOS
.zip
package:- On the device, select “Apply Update”, then “Apply from ADB” to begin sideload.
- On the host machine, sideload the package using:
adb sideload filename.zip
.Tip: If the process succeeds the output will stop at 47% and reportadb: failed to read command: Success
.
-
(Optionally): If you want to install any add-ons, repeat the sideload steps above for those packages in sequence.
Note: Add-ons aren’t signed with LineageOS’s official key, and therefore when they are sideloaded, Lineage Recovery will present a screen that saysSignature verification failed
, this is expected, please clickContinue
.Note: If you want the Google Apps add-on on your device, you must follow this step before booting into LineageOS for the first time! - Once you have installed everything successfully, click the back arrow in the top left of the screen, then “Reboot system now”.
Get assistance
If you have any questions or get stuck on any of the steps, feel free to ask on our subreddit or in #LineageOS on freenode.