Converting a .3g2 file (3GPP2 movie)

[#1]

I found some old movies taken either with a flip recorder or an old phone pre iPhone before 2007.  I can play them the Windows Media Player but there's no sound.  I use CC and wondering what Adobe software I could use to convert these files to update them to Mp4.

Thanks very much.

[#2]

I found some old movies taken either with a flip recorder or an old phone pre iPhone before 2007.  I can play them the Windows Media Player but there's no sound.  I use CC and wondering what Adobe software I could use to convert these files to update them to Mp4.

Thanks very much.