(iH8sn0w's REcovery Buster) is a GUI application designed to put iOS devices into a "pwned" DFU state. This state is necessary for iTunes to accept a custom IPSW (iPhone Software) file, which is often used to jailbreak or downgrade a device.
The original source code for iREB 2.0 can be found on GitHub .
iREB would "pwn" the device using exploits like limera1n or steaks4uce . ireb+40x+41+421+rc3zip+extra+quality
It focused on devices with the S5L8900 chip, such as the original iPhone and iPod touch, and newer S5L8920/S5L8930 chips (iPhone 3GS/4).
Once the device was pwned, the user could open iTunes and "Shift+Restore" to select their custom 4.0.x, 4.1, or 4.2.1 firmware. (iH8sn0w's REcovery Buster) is a GUI application designed
It was famously used to fix Error 1600, 1601, 1602, 1603, and 1604 during the restoration process.
The keyword refers to a highly specific legacy software package used for the iOS jailbreaking community. It specifically highlights the utility iREB RC3 , created by developer iH8sn0w, which was essential for bypassing "16xx" errors in iTunes while restoring custom firmware on older Apple devices. Understanding iREB and Its Purpose iREB would "pwn" the device using exploits like
Verified legacy versions are often hosted on community archives like The Apple Wiki . How to Use iREB (Historical Context)