Before I forget – if you want to save roaming costs, just get yourself a prepay SIM card. Since Telecom NZ is not yet compatible with GSM (they will be next April or so), go into a Vodafone store and buy one! If I remember correctly, the card was about 25 NZ$, 10 NZ$ for talking included. 10 more, if you register in the internet. Topping up is very easy, just call 777 and register a credit card the first time. From then on you need you Vodafone PIN and the last 4 digits of your (registered) CC to top up. No charges for topping up! Oh, and for 1 NZ$ a day you get 10MB of internet traffic. Google for a possible APN, they have 4 of them with different features.