How to unlock iPhone 3G/3GS iOS 4.2.1 with Ultrasn0w


How to unlock iPhone 3G/3GS iOS 4.2.1 with Ultrasn0w

In the following guide you will learn how to unlock the iPhone 3G / 3GS running on iOS 4.2.1, using Ultrasn0w. This can only be done by users who already have jailbroken their devices using our guide, the one that updates the phone’s baseband up to 06.15.00. This also works for users with iOS 4.1, or for those who used PwnageTool to jailbreak, but have the same baseband number as stated above.

Counting on the fact that you already have the 06.15.00 baseband, the unlocking procedure for the iPhone 3G / 3GS with iOS 4.2.1 or 4.1 should not take more than a few minutes. The steps are exactly the same as always, so no hard decisions to take, only god thoughts ahead. Before we start, please note that all this is possible due to the hard work of the iPhone Dev-Team, so consider donating.

Oh, almost forgot. The latest version of Ultrasn0w is also compatible with 04.26.08, 05.11.07, 05.12.01, 05.13.04, 06.15.00, and 01.59.00. The 02.10.04 baseband support will soon be added for the iPhone 4, but you will have to wait until then. Let’s proceed.

iOS 4.2.1 finally unlocked

How to unlock the iPhone 3G, 3GS on iOS 4.2.1 / 4.1 with Ultrasn0w
  1. Start “Cydia”.

  2. Touch on “Manage” ( bottom of the screen ).

  3. Click on “Sources” ( middle of the screen ).

  4. Tap on “Edit” and then on “Add”. A box will appear where you will have to type “” . Now touch on “Add source”.

  5. After the installation is over, search for “ultrasn0w 1.2” in Cydia. Tap on Install and then confirm to complete the installation. This will automatically unlock the iPhone 3G, 3GS.

  6. Reboot.

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