Blackra1n

Credit

Vulnerability, Exploit: geohot

Info

This is geohot's latest jailbreak utility. It is an updated version of purplera1n but now uses geohot's implementation of the usb_control_msg(0x21, 2) Exploit. It has been released for Windows and Mac. It will jailbreak all devices on 3.1, 3.1.1 and 3.1.2. It will even jailbreak OTB iPhone 3GS and iPod touch 3G.

However

So far, Blackra1n does not support hacktivation, so if you don't have a legitimately activated iPhone, then you can not activate it with Blackra1n

How about a 3G/3GS unlock?

At this moment in time, geohot's only unlock is purplesn0w, which only supports the 3.0 baseband. (ultrasn0w only supports the 3.0 baseband also.) And once you update (the baseband), there's no going back for most.

How to use

All you have to do is head to the blackra1n website and download the application on to your computer. Then, plug in your iDevice and press "Make it ra1n". Then you wait. As this is a non-ramdisk based tethered Jailbreak, the iDevice may not boot. If is does not boot, just press "make it ra1n" again.