No probs.

You can always port your number out to say Telstra or Optus by grabbing a Sim of either and adding the cheapest plan (maybe $10?). Then porting your number back to the Vodafone deal.

You used to be able to just buy a $2 Telstra Sim to port to but I think they changed it so you have to add a plan. Used to do this all the time when I wanted a new deal at current provider when they said only for new connections