Can a Sprint iPhone4 be Flashed to Metro PCS?

I have an iPhone 4 that my sister gave me it was with Sprint, she switched to At&t and got another phone. I do not want to sign up with Sprint as from what I have read on the internet this does not have a SIMS card so I can't use it on Stright talk, so my next best thing would be Metro PCS. Anyone ever had this done before? And if so what do they charge?

How did Metro PCS answer your question?

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