: The mention of "RC2Zip" implies a tool or software package likely used in the development and testing phases of iOS or related applications. This helps in ensuring that the final product is stable and compatible with the targeted hardware.
The most infamous of these were the (such as 1600, 1601, 1602, 1603, and 1604). These errors occurred because iTunes performed stringent verification checks on the firmware before allowing installation. If the firmware was custom (modified), iTunes would reject it, failing the restore process and often leaving the device stuck in a recovery loop.
(common when downgrading), the restore actually finished, but the device is stuck in a recovery loop. Re-open iREB and look for the "Recovery Mode Loop Fixer" "Fix Recovery" Click it to kick the device into a normal boot cycle. for your device model? How to Fix iPhone Errors 1600, 1601, 1602, 1603, 1604 ireb 40x 41 rc2zip 1 hot
It is worth noting that the tool's version known as later expanded support to include iOS 4.2.1 and fixed the same set of errors.
For those still working with older legacy devices (iPhone 3G, 3GS, iPhone 4) on iOS 4.x, here is the stable release of . : The mention of "RC2Zip" implies a tool
: Streamlines entry into a modified DFU state to reduce common restore interruptions.
Handles legacy symmetric encryption wrapping and standardized zip file compression. Logical State Flag Re-open iREB and look for the "Recovery Mode
: Earlier variants required the installation of an external, often unstable libusb driver filter that frequently caused Windows bluescreens or peripheral failures. Version 4.x natively handles USB communication without these filters.