(Just after the launch of Apple iOS 5.1, the great gods quickly took action. Just after the release of iOS 5.1 system, iPhone Devteam launched Red Snow Redsnow 0.9.10b6, which is not perfect for jailbreaking iOS 5.1. However, at present, it only supports non A5 devices, that is, iPhone4S 4S and iPad2 2 are not supported.)