Slides from my #debconf20 talk 'My phone runs Debian - and it does phone calls!' (https://debconf20.debconf.org/talks/13-my-phone-runs-debian-and-it-does-phone-calls/) are at https://git.sigxcpu.org/cgit/talks/2020-debconf-mobile/plain/talk.pdf
There's links at the end to the projects / talks i've mentioned.
