For starters, I’m assuming that you’ve not previously jailbroken your iPhone. If you have, and you’re using a tethered jailbreak, you’ll need to restore your device first.
I’m also assuming that you’re okay with the risks inherent in jailbreaking your iPhone. As you may or may not be aware, jailbreaking your iPhone technically voids the warranty. In practice, you should be able to restore your device to the pre-jailbreak state so Apple would be none the wiser, but you should know what you’re getting into.
Next up… Be aware that the Spirit jailbreak doesn’t currently support iOS 4, which Apple is releasing this week. I’m sure it’s just a matter of time before it will be made compatible, but for now it’s not.
Okay, ready? Here we go…
- Make sure your iPhone or iPod Touch is running the OS 3.1.3
- Download Spirit for MacOS X, Linux, or Windows
- Backup your iPhone one last time
- Connect your device to your computer and run Spirit
- Click the “Jailbreak” button
- Wait patiently while Spirit does its thing
- Your device will re-boot and you’re done
That’s it. In my case, it literally took about a second to jailbreak my iPhone. Once it reboots, you should see that Cydia has been installed. This is akin to the iTunes App Store, but it lets you install a ton of unapproved, jailbreak-friendly apps.