We have seen three concurrent beta releases for iPhone OS / firmware 3.0 . The latest one is iPhone firmware 3 beta 4 which is also got jailbroken using QuickPWN 3.0 Beta 4. If you are a developer , You can jailbreak iPhone 3G and iPod Touch using QuickPWN 3.0 Beta 4 , which is an unofficial release by a Russian team. iPhone dev team already clarified that they would release official QuickPWN 3.0 , after the final release of iPhone firmware 3 .

Whats new in iPhone firmware 3 beta 4:

Support for multiple iTunes accounts within iPhone .

Download QuickPWN 3.0 Beta 4 to jailbreak iPhone OS 3.0 .