NSW Employer's Right to Keep Mobile Phone Number?

[RMH]

Hi,
I am moving company and my current employer won't release my mobile phone number unless I show evidence that I am not moving to a competitor.
The number was originally mine and they moved it to the corporate plan with my permission when I started. However, I never signed ownership of it over, they just paid the bill.
Is there any legal argument I can use to force them to release it?
Thank you

 

[Rod]

You must have authorised something else the Telco would not have moved it to the company account.

Do you have anything in writing at the time of the transfer saying they will just pay the bill on their corporate account? The wording of any correspondence with your employee may be important.