iREB is a Windows-based GUI application designed to put your iOS device into a "Pwned DFU" state. In standard DFU mode, iTunes checks for official Apple signatures before allowing a restore. By using iREB, you "pwn" the device’s bootloader, allowing it to accept custom firmware created by tools like Sn0wbreeze or PwnageTool.

Close iTunes if it opens automatically. Launch the iREB executable.

Click the button corresponding to your specific device model.

Re-open iTunes. Hold the Shift key (Windows) or Alt key (Mac) and click Restore . Select your custom .ipsw file. Troubleshooting Tips YouTube·EverythingApplePro E A P

Connect your device to your PC. Turn it off, then follow the standard DFU sequence: Hold Power + Home for 10 seconds.

Typically caused when a custom IPSW is restored over a non-pwned DFU state.