How To Jailbreak iPhone 3GS/3G iOS 4.2.1 and Update to Baseband 06.15.00 With RedSn0w 0.9.6b5
IPhone Dev Team has released Ultrsn0w 1.2 to unlock iPhone 3GS / 3G baseband to 06.15.00 with the supporting updated tool Pwnage tool 4.1.3 and Redsn0w 0.9.6 b5.Fortunately, RedSn0w 0.9.6b5 comes with the feature to jailbreak and also update iPhone 3GS/3G baseband to 16.15.00 to unlock with UltraSn0w 1.2. RedSn0w is available for both Windows and Mac OS X.