Grond writes "Symbian, maker of the the world's most popular mobile operating system, has completed the transition to a completely open platform months ahead of schedule. While the kernel was opened up last year, the entire platform is now open source, primarily under the Eclipse Public License. A FAQ is available with more information about the platform opening." Adds an anonymous reader, linking to PC Magazine's story on the transition: "By putting Symbian fully in the public domain, the Symbian Foundation is pitting it against Google's Android. Symbian is well known across most of the world, but it's mostly a foreign curiosity in the US, AT&T is the only carrier that currently has a symbian phone in its lineup, the Nokia E71x."