The "Unable to Request SHSH" error on 3utools can occur due to several reasons:
Try a different USB cable or port, preferably an original Apple lightning/USB-C cable. How To Fix Error Unable To Request Shsh On 3utools When
: Some users report that the "Easy Flash" method fails while the "iTunes Flash" The "Unable to Request SHSH" error on 3utools
) from Apple's servers. This error often halts the process at the 9% mark and is primarily caused by version mismatches or outdated software. Core Causes of the Error Unsigned Firmware How To Fix Error Unable To Request Shsh On 3utools When