I received a recording in my email but when I download it I am unable to play it. I have real player and windows media center but cannot access the recording.

What is the extension of the video file i.e. . mp4, mov, etc.

Amr.

AMR File (What It Is & How To Open One)

I think it's one of those files from a Nokia phone video.
You can try VLC: VideoLAN - VLC: Official site - Free multimedia solutions for all OS!