Ireb 4.0.x 4.1 Rc2.zip 1 Site
: Connect your iPhone, iPad, or iPod touch to your computer via USB. Launch iTunes. Then, put your device into DFU (Device Firmware Upgrade) mode using the following steps (timing is critical):
The iREB 4.0.x 4.1 RC2 is a fascinating piece of iOS history. It solved very specific, frustrating problems for users of classic jailbreak tools like Sn0wbreeze and PwnageTool. For modern iPhones and iOS versions, tools like this are no longer necessary. However, for anyone tinkering with a legacy device on iOS 4, finding a working copy of this tool is essential for a smooth jailbreak or downgrade process. iREB 4.0.x 4.1 RC2.zip 1