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We’ve posted how to Jailbreak (JB) your iDevice before. With the release of iOS 4, inevitably a Jailbreak and unlock was only a matter of time. Here’s a list of devices that this JB will work on.  Please note that you’ll need to be connected to a WIFI network to complete this guide.


All iPod Touch models on 3.1.2, 3.1.3, 4.0 & 4.0.1 Firmware


All iPhone models on 3.1.2, 3.1.3, 4.0 & 4.0.1 Firmware


All iPad models on 3.2 & 3.2.1 Firmware

(MC Models & New Boot Rom included)

The traditional method of JB’ing would be to download software to your PC and run it with your device connected to your PC via USB.  What’s new about this JB, is that it all happens on the device making the whole process super easy!

Why Jailbreak?

“Jailbreaking is a process that allows iPhone and iPod Touch users to run unofficial code on their devices bypassing Apple’s official distribution mechanism, the App Store. Once Jailbroken, iPhone users are able to download many applications previously unavailable through the App Store via unofficial installers such as Cydia, Rock App, Icy, and Installer. Cydia is popular with users whilst Rock App has a small catalogue of mainly paid apps. Icy and Installer are officially unsupported by their developers and rarely used. Cydia founder Jay Freeman estimates that 8.5% of all iPods and iPhones are jailbroken. A jailbroken iPhone or iPod Touch is still able to use and update apps downloaded and purchased from Apple’s official App Store.”

Basically put, Jailbreaking your device breaks the Apple shackles and opens a whole new world of apps, themes, sounds & much much more!

The Jailbreak

Step 1.

Lets start by making sure everything is up to date. Connect your iDevice to your machine via USB and fire-up iTunes.

In iTunes, head to the toolbar and click Help > About iTunes. (At time of writing it should report

In the navigation pane of iTunes, click on your device and then the summary tab.  Be sure it’s currently running one of the Software versions (firmware’s) outlined above.


Step 2.

Next up is to restore your device.  This isn’t a necessity but is recommended.

Click the Restore button (hold Shift & click if you have already downloaded your firmware.)


You’ll be asked to backup your device.  Choose whether you need to and click the appropriate button.


Then click Restore.


Step 3.

The restoration usually takes a while to complete.  Grab your self a coffee and patiently wait for the slowest device restoration in history!

Once it has finished, choose not to restore from backup and set up as a new iPhone.


Step 4.

Make sure you’re connected to a WIFI network, open Safari and head to this address; http://jailbreakme.com

Give the page a second to load and you’ll notice it says ‘Slide to Jailbreak’.  Slide the button and your JB will begin.  The process took about 5 minutes for me.

IMG_0002 IMG_0003

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And that’s all there is to it.  Your iDevice is now Jailbroken and ready to rock!

The Unlock (iPhone Only)

This unlock will work for;


Baseband 01.59


Basebands 04.26.08, 05.11.07, 05.12.01 and 05.13.04

To check which baseband you’re on; on your iPhone, go to Settings > General > About. Scroll to the bottom of the screen and under Modem Firmware be sure it reports a version as outlined above.

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Step 1.

Open Cydia on your device.

When it’s done loading, click Manage > Sources > Edit (top right) > Add (top left).

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In the address bar, enter this URL: repo666.ultrasn0w.com (the o in ultrasnow is a zero) and tap Add Source.

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Wait for Cydia to reload all the necessary data and tap Return to Cydia.

Step 2.

At the Cydia homescreen, click Search and type in ultrasn0w

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Tap the ultrasn0w from repo666, not SiNfuL

Tap Install > Confirm.

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Wait for Cydia & ultrasn0w to do it’s thing and then turn your iPhone completely off and then back on again.

You may have to wait a few minutes for your SIM to be recognised.

Want to SSH into your iDevice?

Need to lock down root access to your iDevice?

Please note, whilst Jailbreaking your device is not illegal, Jailbreaking your device may invalidate the remaining warranty held with Apple, Inc. for said device.  Device restoration through iTunes rectifies this however.  Jailbreaking also carries a small risk of rendering the device unusable. Whilst we will do our utmost to help if something does go wrong, please note that we assume no responsibility for any damage caused to any device through Jailbreaking.  Please see this forum for any questions or help.

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5 thoughts on “Jailbreak & Unlock your iDevice on 4.0.1 Firmware [How To]”

  1. Rich says:

    Excellent tutorial that will come in very handy for me. Thank you!

  2. RSVR85 says:

    ;) You're welcome. I'm glad you found it useful!

  3. Bryan says:

    Can this work without a sim card?

  4. RSVR85 says:

    Yes, both the Jailbreak & Unlock can be performed without a SIM card.

  5. Tony Poupa says:

    Ohhh can't wait to try it out. Thanks heaps for this.

Comments are closed.

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