The "Unable to load restore ramdisk" error is almost always a or driver issue. Start by swapping your cable and repairing drivers through the 3uTools Toolbox. In 90% of cases, this will resolve the hang and allow the flash to complete successfully.
If 3uTools cannot load the ramdisk automatically, you can obtain it manually from a trusted source. error unable to load restore ramdisk 3utools full
If you are trying to flash or restore your iPhone using 3uTools and encounter the message, you aren't alone. This specific error typically halts the process at around 5% to 20% and indicates a communication breakdown between your computer and the iOS device's temporary loading environment (the ramdisk). The "Unable to load restore ramdisk" error is