Peer-reviewed paper on iOS and Android's practice of sending data\nfrom the device:
\nhttps://www.scss.tcd.ie/doug.leith/apple_google.pdf\n[PDF]
The go-to, default no-/low-Google choice for many:
\nhttps://lineageos.org/
The Ubuntu-based phone OS:
\nhttps://ubports.com/
The e/ foundation:
\nhttps://e.foundation/e-os/
Sailfish OS developers, Jolla:
\nhttps://jolla.com/
Calyx OS (not tested by the author/presenter):
\nhttps://calyxos.org/
enistello's choice of 'best' de-Googled phone OS:
\nhttps://grapheneos.org/
The F-Droid repository for FOSS applications:
\nhttps://f-droid.org/
The DuckDuckGo web browser:
\nhttps://duckduckgo.com/duckduckgo-help-pages/mobile/android/