If I buy an unlocked iphone from the apple website will it work in New Zealand?

So I live in New Zealand and I'm just wondering if an unlocked iphone will work over here?
I have no idea what it means if its unlocked
It said this on the website
'The unlocked iPhone includes all the features of iPhone but without a contract commitment. You can activate and use it on the supported GSM wireless network of your choice, such as AT&T in the United States. The unlocked iPhone 4 or iPhone 4S will not work with CDMA-based carriers such as Verizon Wireless or Sprint'
We don't have AT&T in nz so does that mean it won't work over here?

How does the data plan for the internet access for iPhone 4S work exactly? - 1

I'm going 4S soon (don't care about the 5) and I know that when it comes to when you can access the internet (Safari), you can only access a certain of pages at a time. If I went with the 2 GB data plan then it said somewhere around 100 pages. Does that mean 100 pages per day or 100 pages per month? Also, I was told by a rep.of Verizon that if I'm accessing the Internet using a Wi-Fi connection instead of 3G or 4G or whatever its called, then it won't count towards the data plan at all. Now what if I wanted to access Facebook or Twitter on it? If I used the social networking apps on it instead of Safari, would that count towards my data plan along with using Safari with 3G connection? Please answer my questions because I can't seem to find an answer anywhere.

Added (1). So for the 2GB data plan, I can view more than 100 pages on the internet per day?

Clear iPhone 4 case that can go over skin?

I have a iPhone 4 skin (only on the back) and it legit barely makes it thicker. But I want a clear case to put over it but I'm not sure if it'll fit correctly. Are the any cases made for this or do normal clear cases fit?

Music only plays out of right headphone on iPhone 4?

Okay i know it's not the headphone because I have tried multiple headphones and I have also tried it on different iPhones and for some reason all of them only play music out of the right headphone or if I put it over a sound system it only plays out of the right speaker?

Has this happened to anyone before or know how to fix it?

Is it that a iphone 4s cost 50 dollars?

Ok so dis iphone 4s cost 50 dollars at t mobile with inlimit everythin for 40 dollars a month is dat true and ho much for a new line dis is gonna be my first phone

How much will it cost for me to upgrade from my iPhone 4 to an iPhone 5?

Yeah, i have an iPhone 4 (not 4S), and i was wondering, how much will it cost for me to upgrade to an iPhone 5? The service i have is Verizon and i bought it in May 2011 (1 year and 4 months ago). Can anyone tell me how much it will cost for me to upgrade to the new iPhone 5? I live in Tennessee if that helps.

Logitech s715i versus Altec lancing air 5000 versus bose series 2 sound dock?

Can someone compare
Logitech S715i Portable 30-Pin iPod/iPhone Speaker Dock
Altec Lansing inAir 5000 Wireless AirPlay Speaker MA5000
Bose SoundDock Series II 30-Pin iPod/iPhone Speaker Dock
in terms of music quality and longevity
I do not care about cost, but it has to be portable.
I know the logitechs are popular but they are pretty cheap and hence 'look' pretty cheap.