I have a Treo 600 and my girlfriend has an LG VX7000. I had her record video and sound on her VX7000 and then MMS message it to my account. When I recieved it, it said some error and that it coulndt recognize .3g2

Does anyone know what program I can use to convert her .3g2 file to a readable file on my Treo? And I also want to record video and sound and convert that to a .3g2 file so that I can MMS message her