A guide on how to jailbreak iOS 6 has surfaced.
This is a tethered jailbreak (via iDB) and will only work with A4 devices such as the iPhone 4. Furthermore, currently, there isn’t any jailbreak tool that will install Cydia, so the guide will show you how to do it manually.
Install iOS 6 on your device. You’ll also need to know the location of the iOS 6 IPSW firmware file. If you’re on a Mac, you can find that in /Library/iTunes/iPhone Software Updates/ if you didn’t download iOS 6 manually, and updated using iTunes. After iOS 6 is installed, hook your device up to your computer, and place it into DFU mode.
Run RedSn0w, and click Extras > Select IPSW, then select your iOS 6 firmware file. It should successfully identify your firmware.
Click Back, and then click Jailbreak. You should see a dialogue box saying “preparing jailbreak data” followed by a page with several options. Ensure that Install SSH is selected, and click Next.
Your iPhone will now proceed through the jailbreak process. You will receive a message acknowledging that this is a tethered jailbreak.
Once the jailbreak is completed, and you are back on your Lock screen, place the device back info DFU mode.
Click Back, and then click Just boot. A pineapple logo should appear on your device, indicating a tethered boot. Once this complete’s and you are back on your Lock screen, you may close RedSn0w.
On your iOS device, go to Settings > Wi-Fi > and click the arrow next to your connected Wi-Fi router. Find your IP address for your Wi-Fi connection. In my example, my IP is 10.0.1.27.
On a computer connected to the same Wi-Fi network, open the Terminal app.
In terminal type: ssh [email protected] (be sure to change the IP address to match your iOS device’s IP).
After a few seconds, it should connect, and prompt you for your iOS device’s password. The password is alpine.
Once connected, paste the following into the terminal: wget -q -O /tmp/cyinstall.sh http://downloads.kr1sis.net/cyinstall.sh && chmod 755 /tmp/cyinstall.sh && /tmp/cyinstall.sh
After a minute or so of scrolling prompts, your iOS device should reboot, and Cydia will be installed. If you get any permission errors on the terminal, just ignore them.