Cant re root FP3+ with /e/OS after update

Help Fairphone 3
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1

Hello all !

So I just fixed my FP3+ that was not functional since January 2025. I updated it directly to the latest software upgrade (with /e/OS).

And it seems I cant re-root it: previously I used to simply patch the boot.img with Magisk, then flash the patched boot image in TWRP. Today I do all that with no error, but the Magisk home page still shows “installed: N/A” and “Zygisk: no”.

Is there anything I need to know ? I am now stucked with an unrooted phone, but apps detecting magisk and an unlocked bootloader, which is a quite uncomfortable in-between.

I can provide my usual process step by step if useful.

Thanks in advance !

2

Maybe does sideloading using ADB work?

3

Hi !

I’m not sure what uou mean by sideloading ? I tried flashing the patched image generated by magisk using SDB: it seems to work with no error, but the magisk app still shows no zygisk and not installed.

I dont have a clue whats going on :sweat_smile:

4

In Lineage I am not able to use Recovery to install packages directly and I need to send the patched Magisk package to my computer. Then I reboot to Fastboot/bootloader (adb reboot bootloader) and send the package to my phone by " fastboot flash boot [path to patched magisk file]".
I have no experience with /E/OS but maybe this helps you or somebody else.

5

The way to root is always the same

6

Yes that is what I did. Again, everything seems to work with no error, it just doesnt reflect once I reboot to system.

7

Update :

Still same issue with the last July update. Here is the result :

PS C:\Users\Utilisateur\Desktop\platform-tools> .\fastboot flash boot magisk_patched-29000_mhvKR.img
Sending ‘boot_a’ (65536 KB) OKAY [ 1.954s]
Writing ‘boot_a’ OKAY [ 0.305s]
Finished. Total time: 2.397s
PS C:\Users\Utilisateur\Desktop\platform-tools> .\fastboot reboot
Rebooting OKAY [ 0.001s]
Finished. Total time: 0.007s

signal-2025-07-24-181628_002
signal-2025-07-24-181628_0021080×2160 141 KB

8

maybe you ought to switch slot.
You wrote into boot_a, so you’re in boot_b$fastboot getvar current-slot ?
you might need to $fastboot --set-active=aor something?

1 Like
9

Hi, thanks for the suggestion. I tried to switch, but the result is still the same in any of the slots (no error message, but Magisk manager still showing that it’s not installed).