The iPhone Dev Team has updated their tool for jailbreaking some phones and tablets running iOS 6. Redsn0w 0.9.15b1 now lets you install the Cydia Store for apps that only run on jailbroken devices.
It also adds support for untethered jailbreaks on a handful of devices, and the ability to restore to older firmware that’s no longer supported by Apple.
There are a few big caveats here. First, you can only jailbreak iOS 6 on a device with an Apple A4 processor. In other words, if you have an iPhone 4S or later, iPad 2 or later, or the 5th generation iPod touch, you’re out of luck.
But you can now jailbreak the iPhone 3GS or iPhone 4 and install the Cydia Store. Unless you have a device with an old bootrom, you’ll probably end up with a tethered jailbreak though. That means that if you ever have to reboot your mobile device, you’ll need to connect it to a computer and run redsn0w again or the phone won’t work.
If that doesn’t scare you off, you can find more details at the iPhone Dev Team blog. Redmond Pie also has step-by-step instructions for using the latest build of redsn0w to jailbreak an iOS 6 device.