iREB is a tool for Windows that will put your device into a pwned state so that you can upload custom firmware to it. iH8sn0w has just released iREB r3, to fix iTunes 1600, 1601, 1602, 1603, 1604 error when you use custom firmware. its support all new & old devices.
![iREB 4.0.x/4.1/4.2.1 [r3] Fix 16xx , 29 iTunes Error](http://www.hackphone.co.il/2010/11/images/ireb.jpg "iREB")
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