https://www.howtogeek.com/358166/using-android-without-google-a-kind-of-guide/

Copperhead OS

https://www.howtogeek.com/358166/using-android-without-google-a-kind-of-guide/

https://android.stackexchange.com/questions/207996/can-we-diagnose-and-stop-spying-and-tracking-activities-of-android-apps/208003#208003

https://www.makeuseof.com/tag/using-android-without-google/