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

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

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Doc132 - August 2, 2014 at 8:32pm
for ios 6.1.6 you must use the ios 6.0 ipsw to get redsnow to read the ipsw. this worked for me hope it works for someone else !!