Android Security Patch-aleady unlocked bootloader

Help Fairphone 4
1

I have previously unlocked the bootloader of my Fairphone 4.
Then, sidleloaded IMG-e-2.9-a14-20250321478214-official-FP4
I have not relocked the bootloader.

Now I have sideloaded IMG-e-3.0.1-a14-20250607498722-official-FP4
Can the current Android Security Patch version be reliably read in About Phone to determine whether I can safely re-lock the bootloader?

2

Well, you can use fastboot to know if you can déli ő the bootlaoder.

run " fastboot flashing get_unlock_ability" if it returns 1 then run fastboot flashing lock_critical

if get unlock still returns 1 then you can run fastboot flashing lock to lock the bootloader. If get unlock returns 0 then do not lock the bootloader. Something is wrong then.

3

Thank you for the reply.
`fastboot flashing get_unlock_ability’
returns 1

$ fastboot flashing lock_critical
OKAY [ 0.026s]
Finished. Total time: 0.027s

I don’t see any return indicated.
Do I read this correctly?

4

well the return is there.
the other user went a bit fast but told you to re-run fastboot flashing get_unlock_ability after you have locked critical

5

thank you.
that all worked.
Bootloader successfully relocked

1 Like