As many us of may know, ih8sn0w, the creator of iREB, is always doing his best to fix itunes errors that occur during Restoring or updating your device.

Lots of iDevice users have been facing such errors and are having difficulties fixing them.

The new iREB RC4 will fix errors 1604, 1603, 1602, 1601, 1600 and will work in both iOS 3.x and 4.x

Using iREB is simple. All you need to do is connect your device, go to the Recovery Mood Loop Fixer tab, and press Set Boot True.

To put your device into pawned DFU mode, connect the device, put it into DFU mode, go to the iREB tab, chose your device and wait until it says Done.

Now you can go and install a custom firmware.

For Steps on how to put the device in DFU mode,  Click Here

To download iREB RC4, here is a Quick Link