Yeah, the most “free” option is probably android custom ROMs (anything based on lineageos, I suppose).
There are alternatives that are slowly building up, such as postmarketos, but it’s not production ready.
I think KaiOS was a thing for a while, and it’s based on FirefoxOS. But you would have to ditch the confort of a real smartphone and I’m not sure it’s still active?
EDIT : KaiOS is indeed maintained BUT it is still based on Android (probably with less higher level components)
Yeah, the most “free” option is probably android custom ROMs (anything based on lineageos, I suppose).
There are alternatives that are slowly building up, such as postmarketos, but it’s not production ready.
I think KaiOS was a thing for a while, and it’s based on FirefoxOS. But you would have to ditch the confort of a real smartphone and I’m not sure it’s still active?
EDIT : KaiOS is indeed maintained BUT it is still based on Android (probably with less higher level components)