The latest version of blackra1n is RC3. It now has hacktivation support, 15 second speed improvement, Tiger+PPC support. And it also supports BlackSn0w utility. BlackSn0w is an unlock for the iPhone 3G and iPhone 3GS. It supports the latest firmware 3.1 and 3.1.2 with baseband 05.11.07 and enables official tethering. Available for both Windows and Mac.
Here is a quick tutorial:
If your device is already jailbroken – run Cydia, add repository blackra1n.com and install blacksn0w. That’s it!
If you havn’t done the jailbreak: go to blackra1n.com, download blackra1n, run it, follow the instructions (it is really simple) to perform the jailbreak. Run balckra1n app on iPhone and install BlackSnow.
PS: If you just bought a new iPhone 3GS or have one that was made recently (approximately after 40th week after iPhone 3GS release): your device has a new BootROM. Unfortunately it is impossible to run regular jailbreak with this new BootROM. There is a sloution – tethered jailbreak. Everything including unlock will work fine. However every time you restart your iPhone, you need to plug it to a computer with blackra1n installed.
GeoHot released blackra1n. blackra1n is a 30 second ALL device firmware 3.1.2 jailbreak. There is even supports for iPod Touch 3G jailbreak. For now there is only a version for Windows, but the Mac version should be released soon (UPDATE: Mac version is ready)
Warning iPhone 3G and iPhone 3GS unlockers, do not upgrade to firmware 3.1.2 using iTunes, if you want to keep your unlock. Baseband cannot be downgraded.
Sn0wBreeze 2.9.6(pwnagetool for windows, supports untethered jailbreak of iOS 5.1.1 for iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G, iPad and Apple TV 2G)
Sn0wBreeze 2.9.3(pwnagetool for windows, supports tethered jailbreak of iOS 5.1 for iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G, iPad; untethered for iPhone 3GS with old bootrom; untethered for iOS 5.0.1, iOS 4, iOS 3 supports Apple TV 2G)
Sn0wBreeze 2.8b11(pwnagetool for windows, supports iOS 5, iOS 5.0.1, tethered jailbreak for iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G, iPad, Apple TV 2G; untethered for iPhone 3GS with old bootrom)
Current version is ultrasn0w 1.2.3, download in Cydia(unlock for iPhone 4, iPhone 3GS, iPhone 3G, firmwares 3.0-4.3.3; it supports basebands 01.59.00, 04.26.08, 05.11.07, 05.12.01, 05.13.04, 06.15.00)