These are instructions on how to unlock the iPhone 3G and iPhone 3GS for use with any GSM cellphone carrier using UltraSn0w. This will work with the iOS 4.0 firmware.

Before you can follow these instructions you must have a jailbroken iPhone and you must be on the 04.26.08, 05.11.07, 05.12.01, or 05.13.04 baseband(modem firmware).

To find your firmware and modem firmware(baseband) versions:

Step One
Press to launch Settings from your Springboard.

Step Two
Press to select General from the Settings Menu.

Step Three
Press to select About from the General Settings Menu.

These are instructions on how to jailbreak your iPhone 3G on the 4.0 firmware using RedSn0w for Mac and iTunes 9.2. The Windows version of this tutorial is here.

This tutorial can be used to jailbreak before applying the UltraSn0w unlock. You can find instructions on how to apply the unlock here. It will also hacktivate your device for those not with an official carrier.

Step One
Create a folder on your desktop called Pwnage

Download RedSn0w:

• Mac OSX (x86)

and place it in the Pwnage folder. Likewise, download the latest 4.0 firmware from below and place it in the same folder.

These are instructions on how to jailbreak your iPhone 3G on the 4.0 firmware using RedSn0w for Windows and iTunes 9.2. The Mac version of this tutorial is here.

This tutorial can be used to jailbreak before applying the UltraSn0w unlock. You can find instructions on how to apply the unlock here. It will also hacktivate your device for those not with an official carrier.

Step One
Create a folder on your desktop called Pwnage

Download RedSn0w from

• Windows

and place it in the Pwnage folder. Likewise, download the latest 4.0 firmware from below and place it in the same folder.