GeoHot was the first one to release BlackRa1n tool to jailbreak iPhone OS 3.1.2. The initial version had many issues, and now most of them have been fixed in the latest version – Blackra1n RC2.
Blackra1n RC2 is now available for download from the official site. It let’s you jailbreak iPhone 2G, iPhone 3G, iPhone 3GS, iPod Touch, iPod Touch 2G and iPod Touch 3G – In other words, all devices running the iPhone OS 3.1.2
Features of Blackra1n RC2
1. Fixed 3G issues
2. Tethered jailbreak for 3.1 OOTB ipt 8GB and new 3GSes
3. Fixed Icy issues
4. Both Windows and Mac
Authors bio is coming up shortly. 