/e/ OS locking bootloader or going back to Android

[piero-e]

@Jani

How to know how the security numbers compare, which is newer?

it was possible before the install, but information is nomore available on the device…

@piero-e

If you plan to relock the bootloader after the installlation

(not mandatoty, only available with Official version, why relocking ?)
Most important thing to take care about is the FairphoneOS “android Security Patch Level” already installed on your device before you start the install process.

It must be OLDER than the “android Security Patch Level” included in the /e/ build you want to install, otherwise you risk to change your device into Brick.

• You will find this information about FairphoneOS on the device :

settings --> about phone --> android version 15 --> android security update

https://support.fairphone.com/hc/en-us/articles/18896094650513-How-to-manually-install-Android-on-your-Fairphone

@piero-e

• you will find this information about /e/OS build on the release article about the /e/OS version you want to install,
  the title of the article need to match both “/e/OS version” and “android level”,
  here for : "e-3.2-a15"

Releases · e / os / Releases · GitLab

more detailled explications here : (answered) Install /e/ on FP5 with newer Security Patches - Fairphone - /e/OS community