this post was submitted on 13 Sep 2023
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Privacy
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I sorely miss the hardware features from my previous phone, like a notification LED, MicroSD card slot and headphone jack, but I can't go back to a phone where I can't re-lock my bootloader after installing a custom ROM like CalyxOS or GrapheneOS.
MAC address randomisation is pretty neat too.
Is this something that only certain models of phone are capable of doing? Or is it a new Android/hardware feature that only new phones have?
It requires a flashed rom with a valid (key signature? Crap, forget what it's called).
If you flash an unsigned kernel and try to boot lock, it'll brick.
I get from an absolute security perspective why this is deemed important, I just feel there's a bit too much focus on it, as if an unlocked bootloader is really that insecure. It would still take tremendous effort to get the encryption key for storage, so it's pretty effectively secure still.
It's specific to the bootloader of a given device. Most devices don't seem to support being locked with custom OS images using self signed keys.
Ah, another Galaxy S9?
An Asus Zenfone 6. Still ended up being a regrettable purchase for other reasons.