The following devices are supported:
iPhone, iPhone 3G, iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, the iPad, iPad 2, iPad 3, 4, iPad Mini (3G models)
You need firmware 4.0 or higher to be able to install 3G Unrestrictor. It is fully compatible with iOS 4.x, 5.x and 6.x!
FaceTime on 3G and medium video quality on YouTube require iOS 4.1 or higher!