iH8sn0w has just released iREB a new program for Windows and Mac that can solve the mistakes “16xx” and “21” from iTunes that are displayed after a reset or a firmware downgrade.
When you will be presented such an error will not have to do is start and follow the instructions on the screen. I recommend you download it and keep it somewhere in your computer .. can come in useful!
FSM EXCLUSIVE DEAL The application is only compatible with EDGE iPhone, iPhone 3G and iPod Touch 1G and can be downloaded from here.
NOTE: users reported that it doesent work with Windows 7