If you are thinking of downgrading your iPhone 3G from iPhone iOS 4.0 then it is possible. But before going through the step-by-step instructions of downgrading your iPhone 3G from iPhone iOS 4.0, here are some reasons why you need to downgrade. Well, one reason could be your favorite apps still have not fixed the bugs in iOS 4.0. Another reason is it could be your iPhone 3G doesn’t function well with iOS 4.0 compared to your old iOS version.
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