How to use.avi format video files in iphone?

Hi i'm using iPhone 4g, i used to download.avi movies files from torrent and wanted to c those in iPhone, but unfortunately i phone dnt not support.avi format, so is there any way to watch.avi format files in my iPhone, every time i convert into.mp4 and watch in iPhone, isn't any way to watch.avi movies in iPhone with out any converting?

Q pergunta + besta, pense pra pder falar q erra menos né?

If you use the VLC app.