jailbreaking 1.1.3

Below is a detailed “how to” by myself, based on my experiences with doing so. These instructions are most helpful for someone meeting the following criteria:

• You own a Mac or will be using one during the jailbreaking process.
• You are a legitimate AT&T customer and wish only to jailbreak your phone, not unlock it.
• You have an iPhone, NOT an iPod Touch.
• You have at least a little familiarity with How Things Work™

Okay, so to get started, there are some things you should do in preparation for this procedure:

• Legitimately upgrade your iPhone to 1.1.3 via iTunes but be sure to backup/sync first — this will allow, if nothing else, for you to restore to a working 1.1.3 with your contacts and such intact.
• Download the iPhone 1.1.1 firmware from Apple
• Download lockdownd (you may need this for activation later.)
• Download the Mac 1.1.3 jailbreak package maker
• Download iNdependence v1.3.2 beta

And now on to the fun:

1. If you updated to 1.1.3 as you should before you started, you now have a legitimate, activated, jailed 1.1.3 phone. Congratulations, you’ve made it past the first step.
2. Now, go to this wonderful illustrated guide to downgrading and follow ONLY steps 1 and 2.
3. After you complete step 2, you now have a jailbroken 1.1.1 phone with Installer. Do not be frightened if you get messages about your SIM not being recognized, and that you do not have phone service yet. We will deal with that later.
4. Open Installer and, under System, install BSD Subsystem, OpenSSH, and vt100-term. Close installer — springboard (the main menu program thing) will restart.
5. Now, open the jb113 image and run “Run_This” — follow the instructions and hit enter when prompted, to patch and upload your 1.1.3 firmware image.
6. When prompted by “Run_This” go back into Installer, find and install the “1.1.3 soft upgrade” package under System. The correct one has Nate True as the contact. It will take more than a few minutes to install, so be patient. It likely will delay half-way, that’s fine. If you get a “main script execution” error, just dismiss it.
7. Your phone should now reboot (you may need to do so yourself in some cases), and when you get back to springboard you will see a message informing you of how to use your new jiggly icons, and you should see Installer next to your iTunes Store icon.
8. Dance a little jig of 1.1.3-jailbreaky-success.
9. Open up Installer and re-install BSD Subsystem, vt100-terminal, and OpenSSH.
10. If your phone is not activated and you have no phone service as a result, SCP that lockdownd file you downloaded earlier to /usr/libexec on your phone. Then, restart your phone. iTunes should open and you should automatically activate.

You should now have a jailbroken 1.1.3 phone with the Google LocateMe-compatible baseband, and phone service.

Update: Steps 5-7 have been deprecated, you should use the “official” jailbreak method instead of Nate True’s.