iTunes is not very descriptive in many of its error messages. "Unknown Error 1601" ... what the hell is Error 1601? Errors 1600, 1601, 1602, 1603 and 1604 can arise when you are trying to restore an iPhone with a customized firmware (jailbreak) by tools such as sn0wbreeze or PwnageTool. Fortunately, the same people who think sn0wbreeze also developed a tool to address these errors, iREB.
iREB (iTunes Restore Error Bypasser) is a tool for Windows and Mac which prevents the aforementioned errors paralyze the restoration process. Follow these steps and you can complete the process smoothly.
Note: iREB works with the following models:
- IPhone 2G
- IPhone 3G
- IPod Touch 2G
- IPod Touch 1G
Step 2: Start iTunes.
Step 3: Connect your iDevice via USB cable and put it in DFU mode (to see how the DFU process is done, see
this link).
Step 4: Close iTunes
Step 5: Start iREB.
Step 6: Select your model from the main menu.
Step # 7: You see the screen of your model will go on white or red and IREB may give an error, this is normal.
Step 8: Now go back iTunes, this will detect the iDevice in DFU mode. Press the Restore (Restore) at the same time leaving tight SHIFT key (Windows) or ALT / OPTION (OSX).
Step 9: Select the customized firmware.
Ready, let iTunes now complete the restoration process.