How and when relock bootloader FP4?

[aibd]

@sent

Can I use my email and banking apps safely while the bootloader is unlocked or is my phone now also vulnerable to hackers who can do something with my phone via the internet?

To help decide whether to lock on not https://www.reddit.com/r/LineageOS/comments/n7yo7u/a_discussion_about_bootloader_lockingunlocking/.

While for FP5 … (answered) Install /e/ on FP5 with newer Security Patches.

@sent

Does this only apply to the date of the security update or also to the Android version

Quote, Install /e/OS on a Fairphone FP4– Caution

The value of rollback index is NOT dependent on the currently installed ANDROID VERSION.

@sent

Maybe I can wait until there has been an update.

… but all data will be lost at any lock or unlock.

@sent

I have no idea how to lock the bootloader without a simple installer. Who can help me?

Please explore the manual instructions already quoted … the install is done by a script and you are in charge!

@sent

Can I go back to Fairphone’s Google Android via the FP website and then lock the bootloader without breaking the phone?

As long as you already understood the rollback index and rollback protection errors.