I found the Nokia 6230 failed to display ID3 info (song title/artist, etc) when playing the mp3 file in the built-in music player. If the ID3 tags contain Unicode characters, they are displayed as garbage. However, if there is no ID3 info and the mp3 file name is in Unicode or Big5, it can be displayed correctly!
I wonder why there is such an incomplete support for foreign languages. Isn't the 6230 supposedly multi-lingual? Any comment?