$35
iOrgsoft Video Converter is a competent program with simple to use interface to convert almost all video, audio and movie files like AVCHD, M2TS, MOD, AVI, MP4, WMV, 3GP, MOV, VOB, MPG, ASF, RM, RMVB, FLV (YouTube video) for Windows users, trim and merge files, transfer videos to devices like iPhone, iPod, Blackberry and mobile phones, extract audio from video and save frames as pictures, fast conversion speed and excellent audio-visual quality
3GP File Extension
Audio and video container format developed by the 3rd Generation Partnership Project (3GPP); designed as a multimedia format for transmitting audio and video files between 3G cell phones and over the Internet; commonly used by mobile phones that support video capture.
Video file formats compatible with PowerPoint 2010

Unfortunately, 3GP is not on the list, if you really want to use that 3GP video to make your PowerPoint presentation even more fabulous, you may need a video converter for ppt to convert 3GP to AVI or WMV formats that supported by PowerPoint.
Here's a step by step guide about how to convert and insert 3GP video into PowerPoint.
First download 3GP to PowerPoint video converter
Import 3GP videos, 3GP to PowerPoint video converter supports batch conversion.
Set output formats, for PowerPoint presentation, WMV, ASF, AVI are all accepted.
Click start to convert and play 3GP video in PowerPoint.
Buy iOrgSoft Video Converter $35
Download iOrgSoft Video Converter13.47 MB