For iPhones 4 or 4s, when 3uTools fails to query SHSH after , it will prompt for a forced downgrade :
Completely temporarily disable third-party antivirus shields and Windows Defender. how to fix error unable to request shsh on 3utools when top
However, users frequently encounter a frustrating roadblock: the error. This often occurs when users navigate to the "Top" menu sections or attempt to interact with Apple's signing servers. If you are stuck on this screen, don't panic. This guide will walk you through the technical reasons behind the error and provide step-by-step solutions to get you back on track. For iPhones 4 or 4s, when 3uTools fails
Look at the firmware download section in 3uTools or check a status site like IPSW.me . For iPhones 4 or 4s