And I am not exactly sure if I have heard of a file extension 3gp when it comes to using one of those computers. And when I read the file extension library website to learn about this file extension,  their website says that this file is a relatively new format that represents the Third Generation Presence. You can click on their website to scan for 3gp errors and you can read all about this new file extension at their file extension library as well. And their website also has a top twenty file extensions listing.