If you have a iPhone 4, 4S, 3GS, or iPod touch 4th gen, and want to convert to an untethered Jailbreak version, it is now possible.
WARNING!!! Jailbreaking your device WILL void the warranty, THIS INSTRUCTABLE IS FOR INFORMATIONAL USE ONLY!!! ANY DAMAGE THAT YOU DO TO YOUR DEVICE BY FOLLOWING THIS IS YOUR OWN DOING!
THINGS YOU WILL NEED
Your IPhone or IOs 6x Device
A program called Cydia (google it)
A program called evasi0n (google this as well)
A program called TinyUmbrella (google)
A computer/Laptop Running Windows or Mac OS
It's important to save these files because then you'll be able to downgrade back to iOS 6.1 if newer firmware is released or an error happens during the jailbreak process.
If you don't save the SHSH blobs, there will be no way to get back to your original firmware.
To backup your SHSH blobs:
Download TinyUmbrella and run the app.
Connect your device and then select it from the upper left-hand corner of TinyUmbrella.
Click on the Advanced tab and uncheck the following: Save ALL Available SHSH and Request SHSH From Cydia.
Now that your SHSH blobs are saved, you'll need to do a few more things before you start the jailbreak
A computer, running Windows (XP minimum), Mac OS X (10.5 minimum) or Linux (x86 / x86_64).
Backup your device to iTunes (to save apps, photos, etc.).
Disable the lock passcode (it won't allow you to jailbreak the device with it).