About bootloader on FairPhone 4

[snake29]

Hi,

I just installed/e/os on a FairPhone 4 and I have the following message regarding security at startup.

What advice do you give me to make this message disappear?

thanks

[mihi]

In short: If you installed stable build, you could lock the bootloader again. Be aware it will erase all your data.
If you are on dev now, I would suggest to keep it unlocked and get used to the message.

Long story: Bootloader topic has been discussed alot on this Forum. You’ll find explanations about it

[aibd]

Hi @snake29 there are particular issues related to locking the bootloader on a Fairphone. Please check out the install page Install /e/OS on a Fairphone FP4 - “FP4” where you will see this “Caution”.

Caution: The FP4 comes with an anti-rollback feature. Google Android anti-roll back feature is supposedly a way to ensure you are running the latest software version, including the latest security patches.
If you try installing a version of /e/OS based on a security patch that is older than the one on your device, you will brick your device. Click on Details below for detailed information

(My emphasis,) please follow the link and read the Details section. (Incidentally there is no distinction mentioned there between stable and dev builds.)

The message in your image is about Verified Boot state and generated from Boot Flow  |  Android Open Source Project.

[snake29]

Thanks for your answers.
That’s what I did …
I had to change from Android 12 to 13. Then I used easy-install under Debian.
I followed the procedure here : Try the Easy Installer beta
I joined a screen capture about my version /e/os installed.

So, based on documentation provided by aibd I am about to apply the following procedure :

"Once you have completed the above steps and before rebooting you can lock your Bootloader.

1. Lock critical partition with the following command

• fastboot flashing lock_critical
• Approve with <>Volume +<> then <>power<>

2. Reboot your device into bootloader, and plug it to your computer
3. Lock the device with the following command

• fastboot flashing lock
• Approve with <>Volume +<> then <>power<>"

WITHOUT risking to BRICK my phone !

What do you think ?
Thanks

[aibd]

You have to take account of the “Detail”. For instance, what did you see, before the install, as:

To check the security patch level on your phone with a locked bootloader, prior to installing /e/OS, open your phone Settings » About Phone » Android Version » Android Security Patch Level .Then compare it against the level of the security patch on the /e/OS build as visible in the Downloads for FP4 section below.

Of course now do you know the “prior” date?

@snake29

I had to change from Android 12 to 13.

Perhaps you kept a copy of the download? … or exact notes?

[snake29]

After reflection I think I will leave my phone in this state,
because I don’t want to risk losing several hundred euros.
It poses me no problem.
BR