I've decided to move to 2Degrees now that an affordable option for data is available.
I requested a number port earlier today and now get the following automated message when calling my number.
"We didn't recognise the number you dialed. Please check it and try again"
I can make outgoing calls using my 2Degrees sim and the caller ID shows as my Vodafone number.
I've spoken to someone at 2Degrees and apparently they are looking into this.
I've just tried calling my original 2Degrees number and I get the same automated message.