They said my apple id cannot be used to unlock my iphone

If it's locked to a different Apple ID, log in with that one, or contact the person who can, or if you're the unit's original owner, click here and submit an unlock request.

If it's become unbound from the original account but is still locked, submit an unlock request.

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they said my apple id cannot be used to unlock my phone

Who is "they"?

There are different kinds of locks on the phone. Each requires a different action to get things going again. What does the message on the screen say?

Unavailable?

Security Locked?

Activation Locked?

Something else?