[$] Open source for phones: postmarketOS

Phones running Linux are ubiquitous these days and it has been that way
since Android started working toward dominance in the smartphone market.
Unfortunately, Android has slowly increased its freedom-unfriendliness and
has become something of a privacy nightmare. In a talk entitled "We need
an open-source phone OS" at Open
Source Summit Japan 2025, Luca Weiss described the smartphone landscape
and gave an overview of postmarketOS as an alternative Linux
operating system for mobile handsets.