Can i use my iPhone with Metro PCS?

I've gotten negative and positive answers in the past and i need someone that really knows. If you're guessing don't answer.

Depends, where did the iPhone come from?

If it's a CDMA iPhone, (Verizon, Sprint, Virgin etc) yes. If it's an AT&T or T-Mobile one than no. But it still needs to be flashed over to Metro, and they usually won't do it. There are youtube videos on how to do it yourself.