@sally "AOSP" doesn't actually function on any mobile device, as it lacks the necessary drivers, as most of those are proprietary and not included in "AOSP".

I believe CyanogenMod was the first distribution based off such sources that at least functioned - but a lot of proprietary software was added, even garbage that makes devices useless (it seems to install "google play services" by default, but if you go and painfully remove such rootkit, Android suddenly runs twice as fast and uses half the RAM).

Replicant forked CyanogenMod and then got it to work without proprietary software.

LineageOS was a fork as well, with many technical improvements, but they can't help themselves but to add proprietary software - although Replicant forks LineageOS now.