How to Jailbreak and Unlock Your iPhone 3GS Using RedSn0w (Mac) [4.2.1]

How to Jailbreak and Unlock Your iPhone 3GS Using RedSn0w (Mac) [4.2.1]

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Luigi Pirandelo - November 26, 2011 at 11:14am
Hello everyone! I have a question and I hope you can help me. I have an iPhone 3GS, 4.2.1, 05.15.04 and I want to unlock it. I am planning to backup all my files with iTunes, then jailbreak it and the unlock it with RedSn0w, following this tutorial. I understand that this will change my broadband to 06.15 and the risks. My question: If anything goes wrong with the Jailbreak and I need to reinstall the stock firmware using the iTunes backup, will I be able to bring back my iPhone to the same state before jailbreaking it? Thanks a lot for your help! :-)