iPhone 3G / 3GS Unlock: iOS 4.2.1 Guide with Ultrasn0w 1.2

By Alan Ng - Nov 29, 2010

If you have an iPhone 3G or 3GS and are looking to unlock it using ultrasn0w, you’ll be pleased to know that we have a full tutorial for you to read which which will give you instructions on how to update to the latest version.

Like always, the tutorial guide comes to you courtesy of RedmondPie, as they have given us the important details on ultrasn0w 1.2, which has the ability to unlock certain basebands on iOS 4.2.1, and also iOS 4.1.

It is worth pointing out that this new unlock method does not work with the latest iPhone baseband, instead it will only work on jailbroken iPhones with basebands higher than 05.13.04.

Providing you meet the requirements, you can then head over to RedmondPie for a full guide on getting the unlock to work. As always, those of you with an iPhone 4 will have to wait a little longer for the iPhone Dev Team to work their magic once again.

If you are planning to try out the new ultrasn0w 1.2 software, let us know how you get on.

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  • Mandar

    I purchasd this software. It failed to work on Windows7. I sent a query to support team but got no response. Then I tried it on WindowsXP, it appeared like it worked but did not unlock my phone. Last 2 weeks I have been sending reminders to service team but am not getting reply. I would not recommend this for purchase.

  • Tommyz

    ultrasn0w 1.2 doesnt work. i tried it on my iphone.. and now i m stuck with an iPod
    i had used sn0wbreeze 2.0.2 to help install a custom IPSW with 6.15.00 baseband to use with ultrasnow 1.2 … tried it numerous time already.. installing fresh iOS, jaibroke, install ultrasnow.. i kept doing those steps all day..but all the iphone did was >. Searching for Network for a long time..then pop up NO SERVICe.. everytime ~
    so i guess ultrasnow 1.2 need more work

  • pet3y87

    the instructions on dev-team blog are pretty confusing if you're a windows user.
    when using redsn0w point it at your current firmware then in the next step check the box to install the ipad baseband and it will find it automatically if you have it saved on your computer already. then follow the prompts and enjoy!!