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You can re-lock the bootloader with your own signing key on Pixels. GrapheneOS seems to be the only third party ROM currently taking advantage of it.

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TIL about `fastboot flash avb_custom_key`. Certainly better than nothing, but seeing how it shows a warning on each boot in this mode, it most probably trips SafetyNet as well.

There is another called Replicant IIRC.

But it requires you to set up your own build + signing server in AWS.

https://github.com/dan-v/rattlesnakeos-stack

I haven't tried it, but I believe part of the reason that AWS is recommended is due to the build time.

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