Hi to everyone. I recently bought an iPhone, two days ago to be exact, and just like what I've read in recent posts, the staff initially told me that I can't use some features of the iphone if I am just on prepay

. I felt a bit disappointed knowing that that is their policy according to the salesperson. I left the store and came back and got to speak to a different salesperson, who sold me the iphone (let me add that that was the fastest NZ$1129 ever, within 5minutes, I was out of there). Before buying, the salesperson said that I can actually use the features as they have this new promo $1/10MB on prepay... that I don't have to do anything and I can just access the internet,etc.
Of course, too excited me didn't even bother to ask the exact steps I have to do to be able to do this.
Basically, I just want to be able to use the maps, browse the internet, weather and app store on prepay. Can anyone please tell me exactly how I can do this? And what's APN? I'm starting to get emotional about it as I am having such a difficult time finding a solution to this dilemma. I hope you guys could give some advice.
Sorry but just got to NZ and I am not aware of the different network settings you guys might have here.
Cheers!