It’s only been a couple of hours since Apple pushed out its iOS version 4.3.4 update that fixed the PDF security vulnerability which enabled JailbreakMe.com to work and the mobile platform has already been jailbroken.
This is a tethered jailbreak, which means that every time your iPhone reboots you will have to apply the jailbreak again. Nevertheless, a tethered solution is better than no solution at all and the good thing is that the tool used allows you to preserve your iPhone’s baseband. If you can’t live without a jailbreak and must set your Apple-phone free, follow the source link for a detailed tutorial on how to achieve that.
Source: Redmond Pie