Well, I do not have any practical experiences with such nerve-slayers like the "LG Rumor Touch", but I downloaded the documents "UN510 Rumor Touch Datasheet.pdf" and "UN510 Rumor Touch UG.pdf" from the vendor's support webpage and start reading.
There is nothing said about what ID3 version is supported by the player.
But the given small list of tag-field names leads to the assumption, that basically ID3v1 tag-fields are supported.
So give this a try.
- Use a small set of test files!!!
- Setup Mp3tag to read and write write only ID3v1 tags.
- Setup Mp3tag to remove all other ID3 and APE tag versions.
- Fill the ID3v1 tag-fields TITLE, ARTIST, ALBUM, GENRE, TRACK with appropriate data.
- Check the behaviour of the test files with the player.
Come back and report.
DD.20120517.0914.CEST