"The apple id cannot be used to unlock this phone". and my apple id is correct .
"The apple id t......@gmail.com cannot be used to unlock this phone". and my apple id n password are correct .
iPhone 5s
If it's locked to a different Apple ID, sign in with that one, or contact the person who can, or if you're the iPhone's original owner, submit an unlock request as described in the Related Article above.
If it's become unbound from it but is still locked, submit an unlock request.
(201768)