FairPhone Gen6 Corrupt after manual installing FairPhone Stock OS

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Dear Fellow Experts and Friends,

I am happy with my FairPhone Gen6, however I came to the conclusion that FairPhone OS would be more suitable for me than Murena OS v3.3: so I decided to manually install FairPhone OS FP6.QREL.15.162.0. My FairPhone OS got corrupt after following all the installation steps faithfully to install FairPhone OS when I was locking the bootloader again with fastboot flashing lock. Running the command fastboot flashing lock_critical did work and I was also able to boot FairPhone OS twice.

https://support.fairphone.com/hc/en-us/articles/18896094650513-How-to-manually-install-Android-on-your-Fairphone

After running ./fastboot oem device-info
(bootloader) Verity mode: true
(bootloader) Device unlocked: false
(bootloader) Device critical unlocked: false
(bootloader) Charger screen enabled: true

Furthermore the phone hangs in fastboot mode, it cannot go further and safe mode also does not work. Any help is much appreciated to install FairPhone OS successfully and safely?

Best regards,

Mark

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3 posts were merged into an existing topic: Fairphone 6 unbrick: Trapped in fastboot mode with locked bootloader and corrupted stock ROM

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it appears that it is indeed the case.
I did my own reading and it appears that the culprit is SPL versions.
You’re coming from e/OS 3.3’s december 2025 down to stock 15.162’s November 2025.

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