Troubles after e/OS installation regarding screen lock and activating OEM

Using /e/OS
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1

I installed e/OS using the e/OS browser installer on my Fairphone 5.

After the installation, I locked the bootloader with the fastboot commands:

fastboot flashing lock_critical
fastboot flashing lock

I currently have the problem that I am not able to set a PIN on my phone.

Whenever I try to set a PIN (or any other screen lock method) I get the error that the display lock (screen lock) has already been set. But I NEVER did. It doesn’t matter if I set the lock settings during the initializing process or after the system is fully installed. It won’t get saved.

I read in this article that it could be possible (if I understand it correctly) that the old Google account could potentially leave leftovers? But would it even matter, because Android should have been wiped?

Anyway, I’d love to try reinstall Android, try to remove as much as possible from the system and then reinstall e/OS again. But for that, I need OEM to be enabled.

Unfortunately, I can’t set OEM because whenever I turn it on, I get redirected to the settings overview and OEM is still disabled.

I am in a situation where I have no clue what to do anymore and I appreciate any help I could get.

2

This is Factory Reset Protection, Google “protects” the owner from Factory reset by storing the owner’s password etc in a different partition from userdata; the partition is not wiped by Factory reset.

Other threads on the subject have the hashtag frp in case some more reading helps.

You only need Fastboot mode to start the rollback script, did you double check that you cannot start the script despite no OEM unlock? Often OEM unlock is only enabled after the phone is online.

You do see OEM unlock? That is, you are able to set USB debugging?

3

Thank you for your help.

When I try to roll back with the guide from Fairphone (https://support.fairphone.com/hc/en-us/articles/18896094650513-How-to-manually-install-Android-on-your-Fairphone) it says as well that I need the bootloader to be unlocked. When running the flash script, it’ll show up in the error message as well:

ERROR: The device is not unlocked.
Please refer to our support articles for help.

So yes, I can enable USB debugging, but not OEM unlock