How to Downgrade Your iPhone 3GS, 3G Baseband for Unlock (Mac)

How to Downgrade Your iPhone 3GS, 3G Baseband for Unlock (Mac)

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koky - October 30, 2012 at 6:29pm
Hi Grandpa, I ran my iPhone 3GS with OS6 and 05.16.07 using the latest Redsn0w_10.9.15b2 and iPhone2.1_6.0_10A403_Restore.ipsw per the above process but the phone would not downgrade and unlock. Am I using the correct files. Your assistance and advice is most appreciated. Thanks