Q: Audio Phase issue???

I'm running Final Cut Pro 7 and been having isssues with some audio.  I recorded video with a Canon 7D and used a small boom mike to record sound through the camera.  The footage plays great on Final Cut... it plays great on my TV... plays great on my iPad... BUT I'm having issues when the footage is played on cell phones.

I was told that since phones are mainly mono, the audio track gets cancelled out.  I was then told to shift the audio phase by 180 degrees.  Well, I can't seem to be able to figure out how to do that in Final Cut Pro or Soundtrack Pro.  Any help would be greatly appreciated...

THANKS!!!