Does the customer need to deactivate their old service before they bring their Mobile Dialing Number (MDN) to Cellular One?
No, they should not do so. Once the number has been approved for transfer, the MDN and account with the Old Service Provider (OSP) should automatically be deactivated. It is recommended that the customer follow up with the OSP after the successful port just to be certain. (Note: If you deactivate your account outside of the WLNP process, your number will no longer be available to port to Cellular One.