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Why don't cell phones have BIOS?
(lemmy.eco.br)
This is a most excellent place for technology news and articles.
You can replace the OS on most Android devices.
Specifically- devices made by Google have been unlocked allowing replacement of the software.
You still have to put together a working kernel and drivers, environment, etc.
Not much stopping folks from doing that though.
GrapheneOS, Ubuntu, and others have made headway for some devices.
Each device potentially uses different hardware implementation and features.
Graphene is targeting only google pixel devices.
Ubuntu touch and Ubuntu phone have been picked up by I think postmarketOS
I think AOSP is the best bet for the largest majority of Android users.
Kernel dev is a fun hobby.