Can I connect an unlocked iPhone 4s to Metro PCS?

Can I connect an unlocked iPhone 4s to Metro PCS?

I believe you can't.

If the phone is CDMA like Verizon / Sprint / Cricket, you can connect it to MetroPCS. But if the phone is unlocked GSM only, you can't. You can mail this person (arghyle@rocketmail.com) who can help you get the phone flashed to MetroPCS.