The error can sometimes arise from poor connectivity rather than signing issues.
A: At around 9%, 3uTools queries Apple's TSS server for SHSH. At 34%, it begins flashing NAND firmware, where communication errors can also occur. If the error persists, try a different computer or USB cable.
3uTools requires deep system access to request SHSH from Apple. Without admin rights, the network request can be blocked. how to fix error unable to request shsh on 3utools when top
: You are attempting to upgrade or downgrade to an older iOS version that Apple has stopped signing.
An outdated client is the most frequent cause of the 9% SHSH error, especially on newer hardware like the iPhone 15 or 16 series. The error can sometimes arise from poor connectivity
3uTools sometimes incorrectly lists an iOS version as "Top" even if the device cannot run it (e.g., iPad 2 and iOS 10). Research your device’s maximum supported iOS version on EveryiPhone.com. Do not flash anything higher.
Look at the firmware list. Green entries mean the iOS version is currently signed and fully installable. Red entries mean it is unsigned and will trigger the SHSH error. If the error persists, try a different computer or USB cable
Sometimes the error occurs because the device is in Recovery Mode (Connect to iTunes screen) rather than DFU Mode (Black screen). DFU mode allows for a lower-level connection that bypasses some verification hurdles.
If you’re seeing the error in 3uTools (especially when trying to save blobs from the top toolbar or during a flash attempt), here’s how to fix it.