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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Saver - January 9, 2013 at 9:29pm
OH! I DID IT! READ! I have an iPhone 3G on 4.2.1,SIM-Locked,ultrasn0w wouldn't unlock it...so i upgraded to 06.15 iPad's baseband,then,using the latest redsn0w version,i tried to downgrade from iPad baseband.After redsn0w did it's thing,iPhone rebooted and there was no baseband anymore!no cellular,no wifi,no bluetooth,imei,ecc So i tried other redsn0w versions,finally 09.14b1 was the one that worked!