Sprint iphone 5 factory unlock by meid or imei good or bad esn?

Http://www.gsmfast.net sprint iphone 5 or 4s unlocking. Anyone tested this? Need to get my sprint iphone 5 unlocked. And do they unlock good or bad esn.

Gsmfast.net unlocks sprint iphones.yup i got mine there done and i helped a few other people.

I need it to, my iphone 5 Sprint have bad ESN, please if you make it tell me i'm very interesting to know if they can to unlock it.
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