iPhone v1.1.4 jailbreak and SIM unlock guide - Mac AND Windows [Update]

[Update 2]
ZiPhone 2.5 has been released and with it comes the prospect of jailbreaking and unlocking any iPhone to a jailbroken iPhone v1.1.4. ZiPhone 2.5 works with Windows and Mac (as long as you download the correct version), and makes the jailbreak, unlock, and activation process as simple as clicking a couple buttons.

This guide has been updated to use ZiPhone 2.5 in place of iNdependence 1.4 beta 5.

[Update]
This guide has been updated with instructions for installing the Installer.app application onto your jailbroken iPhone v1.1.4.

If you're rocking the newest iPhone firmware - or want to rock the newest iPhone v1.1.4 firmware - you'll probably want to look into jailbreaking that sucker. This guide applies to all iPhones, new and old. It doesn't matter when you bought your iPhone, it doesn't matter what firmware you're currently using. The only limitation is that the iPhone will not work with Google Maps My Location feature if you use it unlocked on a non Apple-sanctioned wireless network.

Here's how:

1. Connect your iPhone to iTunes.
2. "Restore" your iPhone to v1.1.4 - you might have issues if you "Update."
3. Let your iPhone do it's thing. Go grab a soda or something, it's going to take a while.
4. Download iNdependence 1.4 beta 5 here. ZiPhone 2.5 here. (make sure to choose the correct version - Win or Mac)
5. Put ZiPhone on your "Desktop."
6. Start up ZiPhone.
7. Check the "Jailbreak" box to jailbreak your iPhone v1.1.4
8. Check the "Activate" box to activate your iPhone v1.1.4
9. Check the "Unlock" box to unlock your iPhone v1.1.4 to work with any GSM carrier (the unlock procedure, as far as I know, only downgrades the baseband, it doesn't downgrade your Bootloader - ZiPhone 2.5 works with all Bootloader versions as well).
10. Installer.app is automatically installed with ZiPhone 2.5. If you want to get Installer.app up and running on your freshly jailbroken iPhone v1.1.4 (wasn't that the whole point of running the jailbreak on your v1.1.4 iPhone?), you want to:
    • Download the Installer.app package from:
      http://repository.apptapp.com/packages/System/Installer.zip
    • Unzip to your desktop.
    • Add the Installer.app package to the "Customize" tab in iNdependence.
    • SSH into your iPhone by firing up Terminal (Finder>Applications>Utilities>Terminal) and issuing the following commands:
      • chmod 777 /Applications
      • chmod 777 /Applications/Installer.app
      • chmod 777 /Applications/Installer.app/Installer
11. If you're feeling adventurous, ZiPhone 2.5 gives you the option to downgrade your Bootloader from BL 4.6 to BL 3.9 and then unlock your iPhone with a flash to the older 4.03 baseband. I do not recommend you downgrading your BL or flashing to the older baseband - there's a serious risk of bricking your iPhone if you mess with the Bootloader (that's why not even Apple will update your Bootloader from 3.9 to 4.6).If you really want to downgrade your bootloader, then do so. You can find the downgrade option under the "Advanced" tab. Let us know how it went.
12. That's it! Easy as pie..actually, it's easier.
    Enjoy!