Apple has officially started selling the a factory unlocked version of the iPhone 4S on its Web site. In the offer, you can get the 16GB factory unlocked iPhone 4S at $649, 32GB at $749, and a 64GB iPhone 4S will cost you back $849. The factory unlocked iPhoen 4S aree available in both black and white versions and will ship within one to two weeks.

These factory unlocked iPhone 4S will be only available for the GSM and not CDMA versions supported on GSM networks.