Tag: 16xx
Downgrade from 3.0 to 2.2.1
by lightmaster on Jun.13, 2009, under Guides, iPhone 2G, iPhone 3G
The Info:
This guide is pretty much just for the iPhone 3G and the iPhone 2G. The iTouchs should be able to downgrade like normal. The problem with the iPhones is that the baseband is updated when you upgraded to 3.0. iTunes is incapable of downgrading the baseband and realizes that the baseband is not what it should be on 2.2.1, so it gives you a 16xx error. This guide should help you successfully downgrade from 3.0 to 2.2.1.
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