The iPhone 4S is now available from four U.S. carriers—AT&T, Verizon Wireless, Sprint, and C Spire—but if you’d rather not be saddled with a two-year contract from these providers, Apple today officially started selling an unlocked version of the device on its Web site.

Apple’s globetrotting 4S comes with some hefty price tags. As expected,
- base level 16GB iPhone 4S will run customers $649, (29,205 INR)
- while the 32GB will cost $749 and (33,705 INR)
- 64GB variants will cost $849 (38205 INR).

The unlocked iPhone 4S will take a microSIM from any GSM provider the world over, but Apple makes it crystal clear that CDMA roaming is off-limits. It’s not a huge stumbling block considering most the of world runs on GSM, but it definitely puts a damper on anyone’s plans to try and use one of these things on Verizon or Sprint. Then again, if anyone wanted to do that, they would be better off buying from the carrier directly and politely asking them for an unlock after the initial 60 day period is up.