Can you turn a locked iphone into a unlocked one?

Can you turn a locked iphone into a unlocked one?

No. Trust me YOU can't. Not without getting a provider/phone plan

Yes you can, if you have a computer just connect the locked device to iTunes and reset it, everything will be gone as well as the lock. I don't know if this still works but here's a video showing the procedure.

Yes you can jailbreak and carrier unlock it