My mum is going on holiday to New Zealand next month and would like a couple of questions answered. 1. what to do about mobile phone, we've heard it's really expensive to make (and recieve) calls, is there a cheaper way to do it? she has a Telstra pre paid phone. I've heard of international calling cards - anybody used one or know of a good one to use? 2. where to get money exchanged, she's been told not to do it at hotels as they add a fairly high surcharge. thanks for any input.