Install LineageOS 18.1 and root a FP3(+)
Recently, LineageOS provide the 18.1, based on Android 11 for Fairphone 3 (3 and
3+). I would like to use it, and I need to
root it in order to run some
The big picture is, too
root the phone, with Magisk you
need the file
boot.img from the original ROM provided by the phone constructor
1. We referred to this article for the beginning part of our journey.
Please read it and do the manipulation until
Download the Official ROM.
MAKE A BACKUP OF YOU DATA
You will find a lot of tutorial on the internet.
You have unlock your bootloader according the previous instructions.
Download piece of software
We need to download some software:
- LineageOS 18.1 ROM for Fairphone 3;
- In the same place download the recovery image;
- The latest Magisk zip arxchive;
- Not mandory, but some time useful, the opengapps archive2.
Open a Terminal application and check that your phone is connect to your
computer through a USB cable and you can see it with the command
Enter the command
Your phone must reboot and your should see that it is on
Install the recovery img
We need install the recovery image before installing the LineageOS it self (see below).
Be sure to be, on your computer, on the folder where are all the piece of software you have already downloaded.
Here is the commands your need to use:
fastboot getvar current-slot current-slot: a Finished. Total time: 0.001s
In order to be sure to use
slot a, use :
Then you flash the
boot_a partition with the command:
fastboot flash boot_a lineage-18.1-2021xxxx-recovery-FP3.img
We need to shutdown the phone:
Boot your phone with power and sound up buttons push until the Fairphone logo appears
You should now (after a small wait) be in recovery mode.
adb devices should list your phone. If it’s not the case,
something went wrong in the previous operation, please replay it.
On the phone navigate to
Apply from ADB. Then on the host
adb sideload lineage-18.1-2021xxxx-nightly-FP3-signed.zip
It takes time, be patient.
On the main menu choose
Rebbot to recovery
Install Magisk and
root the phone
On the phone, choose
Apply from ADB, then
adb sideload Magisk-v23-0.zip
The phone will ask you to install the non-signed software, answer ‘YES’.
This step will install Magiosk on the phone and reconfigure the
boot.imgfile to root the phone.
Install OpenGapps (optional)
If you want to install OpenGapps, use the same sequence,
Reboot in recovery. Then once the phone is again in recovery mode
Apply from ADB:
adb sideload open_gapps-arm64-11.0-nano-20210821.zip
Reboot the phone
It’s time to reboot the phone in the new install ROM.
Go back to the main recovry screen with the upper left arrow and choose
Reboot system now
Once again it takes time, be patient, but you should have now a FP3(+) with LineageOS 18.1 rooted.
IN ANY CASE I COULD’T BE RESPONSIBLE OF ANY DEVICE DAMAGE. YOU USE THIS TUTORIAL AND THE SOFTWARE IN YOUR OWN RESPONSIBILITY. IN CASE OF FAILURE, REINSTALL THE DEFAULT OS USING THE FAIRPHONE PROCEDURE.