So I want to know if it's possible to sell a financed Sprint Samsung Galaxy S8 plus? I know it can't be used on Sprint but if it were to be unlocked, could it be used on other carriers like AT&T and T-Mobile?

Let me say that I did find the phone and tried to return it but they didn't answer. Also, it says it's a clean IMEI, is it possible that it will change from bad IMEI months later?