We reported you before yesterday that DevTeam was expressly stated that Apple will prevent the process of downgrading to lower iOS version for iPhone, iPod and iPad running the newly iOS 5. On the other hand, devices running firmwares lower than iOS 5 still in safe side, precisely they still able to downgrade their devices with old iTunes.

Early this morning, the iPhone Dev Team showed off a quick video demonstration for something called backup plan which doesn't waste exploits but this method requires more time to make it work on all devices on iOS 4.2.1.