Hi! FP3plus and LineageOS and unlocked bootloader, How can I do a factory reset to have the FairphoneOS back on it?

[Fairfries]

Hi! FP3plus and LineageOS and unlocked bootloader, How can I do a factory reset to have the FairphoneOS back on it?

My question is, do I have to relock the bootloader at some point?
Also do I need to find the same Fairphone OS with the same security patch of LineageOS installed or is there a quicker way to restore to original settings and lock the bootloader procedure?

Need some help here, thanks

[OldRoutard]

Hi,
I think you’ll find everything you need here.

Before you start, think carefully about which version of FPOS you wish to install, taking into account the fact that with Android 13 there are issues such as the reduced security accreditation of the fingerprint sensor, I’m sure you’ve read all about that.

FP3+: Issues with Android 13 update

First of all, I would like to thank the team at Fairphone for making the Android 13 update available for 3+ years old device. However, software updates are sometimes not without issues. Here’s what I have encountered so far. 1. Delayed SIM unlock prompt after device restart I have locked my SIM card with a PIN to prevent misuse. Previously, the SIM unlock prompt appeared immediately after the device restart. After upgrading to Android 13, this does not pop up immediately. It takes a few more …

I haven’t encountered all of these by any means.

FAIRPHONE 3 and 3+ A13 - Fingerprint sensor update

Hey community, Here’s an update regarding the fingerprint sensor issue: Since the update to Android 13 for Fairphone 3(+), the fingerprint sensor at the back of the device can no longer be used to log into certain apps with higher security requirements, such as some banking apps. The fingerprint sensor can still be used to lock and unlock the device itself and the affected apps can still be accessed using a password or pin code for login. However, we do realize that this is a major inconvenie…

As far as I know there’s no intrinsic obligation to re-lock the bootloader.

If you have any other questions, don’t forget to say which version of LineageOS you’re using at the moment. It might be useful to say why you’re moving, so people can orient their replies usefully.

[Fairfries]

Hi thanks for the reply, I am running lineageOs 20 with latest security patch of November, the latest available, I also remember that I flashed gapps or mind the gapps to have the framework to run certain auth apps. Anyway I was thinking to go switch to FP3-6.A.022.1-gms-6a94c7a3 with fastboot as I understood being the only method.

Also I just wanted to revert the phone to an original state to give it a second life. My thinking was, after reading few things, erase everything with fastboot, flash the new FPOS with fastboot and then relock the bootloader.

Would that work? or I am incurring in critical scenarios because missing something?

Thanks