iPhone Dev team has just released another version of their jailbreaking software Redsn0w v0.9.15b2.
The new version of Redsn0w brings performance improvements and some fixes for iPhone 3GS & iPad which were found in Redsn0w v0.9.15b1 version. From iPhone Dev blog:
Version 0.9.15b2 fixes a few issues for 3GS owners: old-bootrom awesomeness is no longer forgotten directly after a restore, and iPad baseband upgrade/downgrade support is fixed (same production date cutoffs apply!). If your 3GS is currently tethered at 6.0 even though you have an old bootrom, just re-run redsn0w’s Jailbreak step (no need to restore). Don’t forget you can add some pizzaz with your own boot logo or a nerdy verbose boot.
With Redsn0w v0.9.15b2 iPhone 3GS users can now convert their tethered jailbreak to untethered jailbreak and fixed iPad baseband downgrade bug.
Download Redsn0w v0.9.15b2 For Windows and Mac