Opening 3gp File
3GPP Multimedia File is a movie file specially for cell phones. It can be opened by Videolan.
3gp is a file extension of 3GPP multimedia files. It was developed specially for new generation mp3 players and cell phones. 3gp can be opened with any current video player.
If you need to convert those 3gp files to another file format you can easily use Xilisoft software or Total Video Converter
Opening methods of 3gp file
Current Video Players, Videolan
Links to opening 3gp file