Recently launched iPhone 4S has already been selling like hotcakes. Are you looking to buy unlocked iPhone 4S to avoid getting locked into a carrier for the next 2 years? You will be pleased to know that Apple will start to sell iPhone 4S without contract from November in the US.
Unlocked iPhone 4S will only work on supported GSM networks. Sadly, unlocked iPhone 4S will not work on CDMA carriers like Verizon and Sprint. However, you can also use a micro-SIM card from a local GSM carrier, when you travel internationally. That will help you to fork out for heavy roaming costs when you travel.
Below is a breakdown of the iPhone 4S without contract / unlocked iPhone 4S price in USA: