As we know, Apple has released a security firmware update of iPhone firmware. The iPhone OS 3.0.1 fixes SMS vulnerability, which secures the iPhone from attackers.
If you upgrade your jailbroken iPhone then iPhone 3.0.1 firmware will break the Jailbreak for iPhone. But iPhone Dev team has confirmed that we can use Redsn0w 0.8 and Ultrasn0w 0.9 to jailbreak and unlock the iPhone.
Few hours ago, Apple has released an update for