With Converter App, you can convert 3GPP files into many other formats:
3GPP to MP4 | 3GPP to MP3 | 3GPP to MOV | 3GPP to WEBM | 3GPP to M4A | 3GPP to WAV | 3GPP to MKV | 3GPP to AVI
→ All 3GPP Converters
If you want to keep working with your final OGG, try:
OGG to MP3 | OGG to WAV | OGG to M4A | OGG to FLAC | OGG to AAC | OGG to TEXT | OGG to MP4 | OGG to PDF
→ All OGG Converters