FP6 After eOS 3.6 to Android A16 Rollback stuck in Bootloader

/e/OS Devices Fairphone
1

Hi there,

I was using my FP6 with e/OS 3.6 A15 (15.176). Since my finger print reader didnt work, I was told to reflash.

So I waited for a new version: Android 16 (16.48.0), Securit Patch 05. Feb. 2026 (which is supposedly the same)

All worked fine, but when I locked the bootloader, it said that the decive is corrupt, and it ist stuck in bootloader now.

When trying to flash again it says

ERROR: The device is not unlocked.
Please refer to our support articles for help.
ERROR: Aborting now (press Enter to terminate).

So I tired to unlock

C:\adb\platform-tools>fastboot flashing unlock
FAILED (remote: 'Flashing Unlock is not allowed
')
fastboot: error: Command failed

C:\adb\platform-tools>fastboot flashing unlock_critical
FAILED (remote: ’       Device already : unlocked!')
fastboot: error: Command failed

is there any option to get it running without FP Support? or is it bricked and I cant do anything?

Thx for help

Cheers

Andi

2

e-3.6-a15 Android Security Update is 01. march 2026
[HOWTO] a Clear Guide to install "IMG-e-builds" when /e/ web installer fails

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C:\adb\platform-tools>fastboot oem device-info
(bootloader) Verity mode: true
(bootloader) Device unlocked: false
(bootloader) Device critical unlocked: true
(bootloader) Charger screen enabled: true
OKAY [ 0.017s]
Finished. Total time: 0.019s

C:\adb\platform-tools>fastboot flashing get_unlock_ability
(bootloader) get_unlock_ability: 0
OKAY [ 0.004s]
Finished. Total time: 0.006s

C:\adb\platform-tools>fastboot flashing unlock
FAILED (remote: 'Flashing Unlock is not allowed
')
fastboot: error: Command failed

C:\adb\platform-tools>