What is 3GP?
3GPP File Format
The 3GP format was created by the 3rd Generation Partnership Project for the purpose of transmitting multimedia over cellular networks. 3GP was designed for 3G phones, but some 2G and 4G phones support it, too. Below, we’ve provided specifications for the 3GP file type.
A 3GP file can contain video, audio, and timed text. The video is encoded with either H.263 or H.264, and the audio with AMR-NB, AMR-WB, AAC-LC, HE-AAC v1, or Enhanced aacPlus. Most likely, your phone can play 3GP files, but opening these videos on other devices might be tricky. Some of the programs that support the playback of 3GP files are listed below. Refer to this list if you’re not sure how to open these videos.
VLC, QuickTime Player, and MPlayer