Today Apple’s US online store began processing orders for the unlocked iPhone 4S, priced at $649 for the 16GB, $749 for the 32GB, and $849 for the 64GB, keeping its promise to provide the unlocked handset in November. The company advises:
The unlocked iPhone works only on supported GSM networks, such as AT&T in the U.S. When you travel internationally, you can also use a micro-SIM card from a local GSM carrier. The unlocked iPhone will not work with CDMA carriers such as Verizon Wireless or Sprint.
An unlocked iPhone 4S has much appeal to those who frequently travel abroad because they can just slip in a local carrier’s SIM card to escape paying astronomical roaming fees.