After being announced several months ago, Pine64's inexpensive "PinePhone" Linux
smartphone looks like a cheaper, entry-level alternative to the relatively
popular Librem5
[https://tuxphones.com/purism-librem5-smartphone-gemalto-pls8-4g-lte-modem-bands-regions-speeds-gps/]
Linux smartphone by Purism, which promises total privacy and a full mobile Linux
experience.
In fact, most of the work on Linux for smartphones