The term refers to a multimedia container format specifically designed for 3G mobile phones. It was optimized for low bandwidth and small storage, leading to poor visual quality by modern standards. MMS (Multimedia Messaging Service) is the protocol used to send these files between mobile devices.

This is the funniest part of the title. In the world of 3GP—where the frame rate was often 12 frames per second—"Extra Quality" usually meant you could actually tell there was a human being on the screen. The Catch:

If this phrase were a movie, it would be a "period piece" set in 2008. Here is a breakdown of why this specific string of words is so iconic to the early internet: The Format (.3GP):