Blackra1n claims to be a 30-second jailbreaking tool for all devices running the iPhone 3.1.2 firmware. I didn’t have much success when I ran the app, but a lot of people seem to be having more luck than I. The Blackra1n blog warns that 3G or 3GS users who require their phones to be unlocked should not upgrade to 3.1.2 ...
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