Switch your iPhone to the XT network
Well Telecom may not be selling the iphone 3gs, but they have come up with the following offer which was taken from there website. It is probably aimed at those who buy the new phone outright from either Apple or Vodafone:
Bring your iPhone 3G or 3GS to XT, sign up to a 24 month One Rate 180 plan or higher and get $600 account credit, plus get 240MB of data FREE each month for 24 months.
You can also keep your Vodafone number. Get in quick.
Offer not available online. To sign up, visit your nearest Telecom store or call 0800 662 435.
Here is a comparison chart for you to see if its worth doing (thanks to http://www.geekzone.co.nz/lotech/6634 for the chart):
So there you go! It’s not quite the ‘Telco’ battle which would lead to some great deals, but it is a good start I guess!