Good news ! The hacker who had promised an iPhone unlock for the latest baseband has released BlackSn0w or Blacksnow much ahead of schedule and you can now Download Blacksnow and Unlock your iPhone 3GS for free
blackra1n RC3 is also live for both Windows and Mac!!! Clean firmware 3.1.2 and baseband 05.11.07 are recommended.
Updates:
Unlock!!!
Hacktivation
Keep legit activation if activated before running app
15 seconds faster, you’ll feel it
Tiger + PPC support
Hit http://www.blackra1n.com/ for the download for windows and mac.