How to convert MKV to 3GP
- More info you can visit: MKV to 3GPP.
The FREE version: MKV to 3GPP Converter. 
Load video files- Click "Add File" button on the toolbar or "File > Add File" to load files.
Select output folder and format-
Choose the file, click "Profile" drop-down button to choose the format you need, then click "Browse" button to choose destination folder for saving output files.
Convert MKV to 3GPP- After choosing the format, you only need to click "Convert" button on the toolbar to complete the task.
- Ok, the above is the easiest function for your conversion.
