The popular jailbreaking tool PwnageTool has been given an update after a very long time. iPhone Dev Team has updated PwnageTool to version 5.1.1. You can now download PwnageTool 5.1.1 for iPhone 4, iPhone 3GS to preserve your baseband, which will keep your unlock safe when updating to iOS 5.1.1.
From iPhone Dev team:
PwnageTool also avoids any possible sync issues, but again it applies only to A4+earlier devices. If you unlock your iPhone with ultrasn0w or a commercial method, you must use PwnageTool to avoid updating your baseband otherwise you’ll lose the unlock. PwnageTool will also jailbreak+untether the AppleTV2,1 5.0_2B206f (unless you customize the IPSW further, you’ll have just basic SSH access to the device).
Download PwnageTool 5.1.1 For iPhone
You can now download PwnageTool 5.1.1 for iPhone 4, iPhone 3GS from the link below and preserve your baseband to keep your unlock. PwnageTool 5.1.1 does exactly the same thing as Snowbreeze does for Windows, except PwnageTool 5.1.1 is for Mac.
Download PwnageTool 5.1.1
We will be bringing a full how-to guide on jailbreaking while preserving baseband for iPhone 4, iPhone 3GS on iOS 5.1.1. So stay tuned to Maypalo.