Unlocking bootloader online vs offline

Just one more idea - correct me if I’m wrong.
Online OEM unlocking is a feature of factory os of FP4?
Does it mean if I would flash any other os on FP4 - will unlocking other os require also online code from FP site? Anyone could confirm or deny this?

You don’t need to enter a unlock code if you want to toggle OEM unlocking on a custom ROM.
I myself can confirm this for CalyxOS and @Volker just confirmed it for /e/:

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I tried it right now on iodé.
Yes, right. I don’t need a code to enable it

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I’m not exactly sure what your idea is. But I’ve the impression that the idea is to flash a custom ROM and this way avoid online OEM unlocking of stock ROM. But this idea won’t work because to flash a custom ROM you’ll need an unlocked bootloader. And for unlocking the bootloader you’ve to enable OEM unlocking. So (online) OEM unlocking stock ROM will always be the first step of a new device (except you buy it with a custom ROM pre-installed).

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To unlock OEM on FP4 you need to enter a verify code.

There are In-Browser generators for verify codes for FP3, see other thread.

However, these generators fail for FP4 with message " IMEI must be 15 characters and serial must be longer than 10 characters.". Indeed, the FP4 serial has only 8 characters.

Could anybody provide a verify code generator for FP4, based on the existing work for FP3?

Update: I adapted the input length check and removed the format check. As a result, the script works, but the generated verify code doesn’t work.

The mechanism has long been changed, anything for Fairphone 3 from 2020 won’t work.

If you want to unlock your Fairphone 3/4/5 phone, use the official page for it: Bootloader Unlocking Code for Fairphone - Fairphone

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