Apple has started selling the unlocked iPhone 5 handsets in the United States. In case you did not want to sign a contract with any of the telecomm carriers, you can buy the iPhone at a price of 16GB for $649, $749 for 32GB, and $849 for 64GB. The unlocked phones can only work on certain networks. For example, the aforementioned iPhones work on GSM networks like AT&T. It can also be used when traveling abroad. The unlocked iPhone 5 purchased in the U.S. cannot be used on Verizon or Sprint.