Don't listen when people say iPhones are junk. It's personal preference. I like it because of the simplicity, and a majority of people have it around where I live so we can do the same shit like iMessage. Android is cool in customization and all, but I don't like the platform. Returning to your question, make sure it's unlocked internationally. Unless your using a prepaid carrier, Im pretty sure it'll work, but I have no experience using it out of the country. iPhones are iPhones, I doubt they have a certain iPhone for every damn country.