A THM file is a theme file created for Sony Ericsson mobile phones. It is used to change the graphical interface for the end user with several setting parameters. These include settings for text colors, icons, background wallpaper, custom window, and other images. Sony has provided free Ericsson Themes Creator software for creating theme files. It can also e used to open existing THM files. THM files have media type application/vnd.eri.thm.
Sony Ericsson THM File Format - More Information
A THM file is actually a container file that contains a bunch of other files. It is saved in TAR archive file format and can be extracted with any standard decompression software that supports TAR file format.
A THM file contains an XML file, several image file sin .png, .pjg, .gif formats, or .swf files.
How to create Sony Ericsson Themes?
The Sony Themes Creator software can be used to generate new themes for Sony Ericsson mobiles. Users can follow the Sony Themes Creator Developer Guide to create themes.