How to update to iOS 4.1 and keep the baseband untouched


08.09.2010

How to update to iOS 4.1 and keep the baseband untouched

The following guide shows you how to update your iPhone 4, 3GS, 3G or any iPod Touch, to iOS 4.1, while preserving your baseband to 1.59.00. This means you can get all of those nice features of the iOS 4.1, without losing the possibility to unlock later. So you can now safely update to iOS 4.1, using the following steps, and use any SIM cards on your device.

Before continuing, let me explain this a little. You will need to first save your SHSH Bloobs. If you haven’t done this already, we are going to use software that has that feature too: TinyUmbrella. And a second thought, do not do this if you absolutely rely on your unlocked device. It is not 100% proven and it might not work for all of us. When I say this, I am referring to updating your baseband to 2.10.4.

And last but not least, this will only help you unlock your iDevice, after a jailbreaking tool for iOS 4.1 will be developed. Counting on the rumors out there, this should be in the following weeks. After it will be released, jailbreak it, and then use this tutorial to unlock. Now let’s get started:

Upgrade to iOS 4.1 while preserving the baseband

How to update to iOS 4.1 and keep the unlock possibility
  1. Download and install TinyUmbrella 4.1.3.

  2. Start TinyUmbrella and then select your device from the right column. Save your SHSH Blobs if not already, and then click on the Start TSS Server button.

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  3. Open iTunes and then download iOS 4.1, for your device. Using iTunes Restore, not the update center, install the iOS 4.1. Make sure you have the latest version of iTunes installed.

  4. An iTunes 1004 error will appear. That means the baseband update failed. It’s ok, we want this. All you have to do now is to click on the “Kick Device out of Recovery” button.

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