MuscleNerd has announced a major update to RedSn0w that removes the need to select an IPSW and brings the ability to save and submit your SHSH Blobs to Cydia.
The iPhone Dev-Team has released updates to RedSn0w and PwnageTool that fixes the iPhone 3GS and iPhone 4 side switch vibration issue, fixes verbose mode for the iPhone 3GS, and improves Windows 7 compatibility.
Instructions on how to jailbreak and unlock your iPhone 3G on the iOS 4.2.1 firmware using RedSn0w for Mac. This tutorial can update your baseband if needed for unlock.
Instructions on how to unlock the iPhone 4, iPhone 3GS, and iPhone 3G for use with any GSM cellphone carrier using UltraSn0w. This will work with the iOS 4.2.1 firmware on the 06.15.00 baseband.
Instructions on how to jailbreak and unlock your iPhone 3GS on iOS 4.2.1 firmware using RedSn0w for Windows. This tutorial will show you how to upgrade your baseband to the iPad baseband if needed.
Instructions on how to jailbreak and unlock your iPhone 3G on iOS 4.2.1 firmware using RedSn0w for Windows. This tutorial will show you how to upgrade your baseband if needed for unlocking.