3GP file open in Apple QuickTime Player 10.5
The 3GP is a multimedia container format is based on the ISO media file format. It stores video streams as H.263 or H.264. and audio streams as AMR-WB, AMR-WB+, AMR-NB, HE-AAC v1, AAC-LC, or Enhanced aacPlus.
3GP files are commonly used by 3G mobile phones that support video capture but may also be played on select 2G and 4G phones. If the video files are transferred to a computer you can open them with a variety of programs, such as Microsoft Movies & TV, Apple QuickTime Player, or VideoLAN VLC media player.