[mothered]

Is there any other ways? Could I say it is broke and ask for a refund then put my old phone in the box they want refunded?

Don't mention that It's not working- this will give them reason to check the return.

You can use the "sealed box method", which has a very good chance of success, but there must be no signs of tampering whatsoever. As such, they'll place It back Into stock and Issue a refund thereafter.

Alternatively, you can box them.