From the first Ultrasn0w 1.0-1 screenshot it is clear that it can unlock

iPhone 4 Baseband 01.59.00 and

iPhone 3G/3GS 04.26.08(3.1.1), 05.11.07(3.1.2), 05.12.01(3.1.3) & 05.13.04 (iOS 4.0/4.0.1).

Meaning you will be able to unlock any firmware from 3.1.1 to 4.0.1.

It’s important that you save iPhone 3G/3GS & iPhone 4 4.0.1 SHSH Blobs, since JailbreakMe userland jailbreak will be blocked by Apple with new iOS update any time soon. Via Mobile-Geeks

Ultrasn0w 1.0-1 image was found in Hashim Sherif’s Photobucket album (deleted now).

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Those of you with jailbroken iPhone3G and ipt2G devices may now have noticed Cydia starting to save your SHSH blobs too, just like it does for iPhone3GS, ipt3G and later devices. That’s because starting with 4.0, Apple started putting a “soft” SHSH blob check in the firmware. The SHSH blob check is very real in the sense that if iTunes can’t get your blobs (because the Apple signing window has closed), the iTunes restore will error out. But it’s “soft” in the sense that those devices can always use redsn0w or PwnageTool to get past the error (the bootroms themselves for those devices don’t require blobs to be in the firmware files, unlike the newer bootroms).

Furthermore, since the 3.x IPSWs for these devices don’t enforce it, you can always restore to 3.x IPSWs outside of any signing windows.

So, Cydia is doing this to allow you to continue to use iTunes to restore to 4.x on iPhone3G and ipt2g outside of Apple’s signing window without needing to use redsn0w or PwnageTool to get around Apple’s annoying new restriction.

iPhone 4 unlocked with UltraSn0w yet again using 2nd way of the three ways Dev-Team has to implement the iPhone 4 unlock exploit. MuscleNerd has shared an unlocked iPhone 4 screenshot. Before this Planetbeing succeeded in implementing the first way of the unlock.

unlock iphone 4

If you don’t know, Planetbeing and MuscleNerd have been working on iPhone 4 unlock for a few weeks now. They found an exploit to unlock iPhone 4 and then come up with 3 ways to take advantage of that loop hole to inject the baseband unlock. Planetbeing had already unlocked iPhone 4 using on of the 3 ways (Demoed here) and now MuscleNerd has implemented the unlock using the 2nd way. They’ll release the one which is more stable, fast and easy.

This is what MuscleNerd has tweeted:

Yay, got the 2nd of 3 ideas working. http://is.gd/dxTwO <- my ultrasn0w’d iPhone4. Now @planetbeing and I can compare

Here’s the screenshot of unlocked iPhone 4 he shared:

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