A tethered jailbreak is a term in which if for some reason you need to restart your jailbreaked iPhone you need your iPhone attached to a computer to assist with the booting sequence. Some users of iPhone tethered jailbreak is always worried that their iPhone might run out of battery or suddenly froze and that will require cold boot.. worry no more untethered jailbreak is here.

A new jailbreak tool named “Spirit” is now available which allows you to modify the iPhone OS to enable tethering or run apps not approved by Apple through appstore. The “Spirit” jailbreak works with all three iPhone OS powered iDevices such as iPhone 3.1.2 and 3.1.3, iPod touch 2G/3G, and the new iPad 3.2.

Speaking of iPad, the Spirit author mentioned that for iPad jailbreak is still in beta version which might resulted to some apps can cause problems for the device. I guess this must be something to do with Cydia, which is primarily designed for iPhone and using it for iPad might break some apps.

Also, you need to know that “Spirit” is for jailbreaking only and won’t unlock your iPhones this means you’re stuck with carriers supported by Apple (e.g. AT&T, etc.). You might also need to review the Apple terms that might break warranty or discontinue your mobile phone service by doing this process.

This tool is currently available for both Windows and Mac OS X.

The official instructions and requirements are follows:

What’s Spirit?

Spirit is an untethered jailbreak for iPad, iPhone, and iPod touch on the latest firmwares.

Spirit is not a carrier unlock.

If you currently are using a tethered jailbreak, you have to restore to use Spirit. Do not upgrade if you use an unlock on an iPhone 3G or 3GS. (You can, however, restore to 3.1.2 if you have SHSH blobs for that version.)

(If you mistakenly ran Spirit despite using a tethered jailbreak, try these instructions.)

Requirements

Any iPad, iPhone, or iPod touch on firmware 3.1.2, 3.1.3, or 3.2.

An activated device: one not stuck on the Connect to iTunes or Emergency Call screen.

Any version of iTunes 9 (including 9.1.1).

Syncing with iTunes before trying this is highly recommended.

Here’s the simple steps to guide to jailbreak iPhone 3G and iPhone 3GS (all versions) untethered on the latest iPhone OS 3.1.2 or 3.1.3.

Step 1:
Download and install the latest version of iTunes

Step 2:
You will need to be on the official iPhone 3.1.2, or iPhone 3.1.3 firmware on your iPhone.

Download iPhone 3.1.3 firmware for iPhone 3G

Download iPhone 3.1.3 firmware for iPhone 3GS

Step 3:
Download Spirit for Windows or Mac

Step 4:
Connect iPhone into your computer, Run “Spirit” and then Click on “Jailbreak” and wait about 28 seconds.

After Spirit is finished running, your device will restart and you should see the Cydia app included in your apps screen, this confirms that the Spirit jailbreak has completed successfully.

Disclaimer: This guide is for testing and study purposes only therefore I’m NOT responsible for any data loss or device malfunction, so be careful use it at your own risk!.