Google’s Android is based on an open source platform called AOSP, which can be used as a base for phone operating systems that are not integrated with Google’s proprietary spyware. However, Google is the primary maintainer of the AOSP project, and it’s about to remove the Dialer and Messaging apps from AOSP and instead include them in Android. This is bad news for open source phone operating systems like Graphene and Lineage. https://www.androidauthority.com/google-kill-android-aosp-dialer-messages-app-3334980/