Fairbuds XL firmware source or development

I know the Fairbuds XL are very repairable physically but it made me curious about the software running on it too: How much did fairphone talk about it? I know the app for example updates the headphones, but how does it do so? Or is there a mode you can flash the headphones yourself in case an update fails for example, with the USB cable? I haven’t been able to find anything about it.

Hopefully some people can share some info about it! I’ve always been curious how they’re made, I don’t think there’s that many updates for it either, so if the community can also add things themselves, it could be useful!

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So more research: It uses the QCC3034 chipset, and said chipset can be modified with the right software. Sadly said chip also might be locked with a 32 digit code, and I have no idea if they changed it or if they use the normal “all zero” code. I have no idea if any fairphone employees might be lurking here who could respond, either.