If I buy a an unlocked iphone in America can I use it in Ireland?

Buying an iphone this summer while I'm in the states if it is unlocked will I be able to use it in Ireland!

Yes! If you buy an unlocked iPhone in America, you can use it in Ireland. But, unlocked iPhones are too expensive. Better you buy a locked iPhone and unlock it from any of the service providers like http://www.theunlockspot.com/apple-iphone/rs16wp9/ to unlock it. Once, you unlock your iPhone, you can use it with any other GSM carriers.