Where you can subscribe to the RSS feed, to learn about the release of JailBreak for iPhone 4 iOS 4.1 as soon as it appears? (Which site publishes accurate, reliable information on this issue?)
The fact that the device was originally with IOS 4.0.2, but a way to downgrade to 4.0.1 does not work for iPhone 4 so waiting for the JailBreak for 4.1.
PS to All the answers thank you very much.