Is it possible to switch a sprint iPhone 6 over to metro pcs?

My current phone company is metro pcs I have a galaxy j7 prime (2017) my cousin gave me his iPhone 6 (he thinks it's boost mobile but when I checked the settings it says Sprint) help

Sprint iPhones do have a GSM transmitter in it so it will work on metro pcs.

You probably can, but it doesn't mean it'll work

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