I cannot post there, so I will post here.
It's not very fair for those travelers or business people travelling to NZ with a international roaming cellphone. They've signed for a contract pay ridiculous prices and then you say dropped calls might happen and if you wanna fix it, go to Vodafone and buy a new phone and be put on a NZ number on a different pricing plan and then you need to advise all your associates of your new phone number?