Sn0wbreeze 2.4 beta 1 which was released today fully supports Ultrasn0w unlock for the iPhone 3GS and iPhone 4 and that too on iOS 4.3.1. But of course on older basebands.

Ultrasn0w-1.2

The newer basebands aren’t supported in any case, Apple has really made things tough for hackers out there to achieve a carrier unlock. But thanks to baseband preservation in Sn0wbreeze, you can unlock your iPhone 4 and iPhone 3GS running on iOS 4.3.1. Head over to RedmondPie for a complete step by step guide on how to unlock your iPhone 4 and iPhone 3GS using Ultrasn0w.

Mac users can follow the steps posted here on how to jailbreak their iPhone, iPod touch and iPad using PwnageTool:

Mac users should check out:

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