If you're in the U.S. it's probably not so easy deciding which carrier is best for your iPhone 5 needs, AT&T, Verizon, or Sprint. Price is always a huge factor to consider when choosing a carrier, but coverage should be just as, if not more, important when making a decision. Since the iPhone 5 supports LTE cellular technology, you're going to want to take a close look at which carriers offer the best LTE coverage in your area. Then there's the matter of simultaneous voice and data -- AT&T can do it over HSPA data, but Sprint and Verizon need Wi-Fi. And don't forget international roaming.