I am thinking about buying an iPhone but only buying the handset because I

don't want a contract.........? What features will I NOT be able to use? As I said Im only going to buy the handset itself, (pre-pay is not available with vodafone here in NZ but I can put my vodafone sim in it) so I'm not sure what features will not work.....
And an iphone without a contract does not mean you have no phone capabilites, of course you do! have you never heard of Pre-Pay!? you just put your own sim card inside and it will work.