Apple quietly updated the online Apple Store to give US buyers the option of an unlocked iPhone 4S. As in other parts of the world, the smartphone is available at full price in return for going without a contract and being usable on nearly any GSM network in the world as long as the owner has a micro SIM card. The 16GB, 32GB, and 64GB versions are on sale at the same $649, $749, and $849 as they are in Canada.
