Use blobsaver with "Set ApNonce" enabled, or use a jailbreak to set a generator (like 0x1111111111111111 ) before saving blobs. 3uTools cannot do this reliably.
SHSH (Signature HaSH) blobs are small digital signatures that Apple issues when you install iOS. Think of them as a unique handshake between your specific device and Apple's server. When you restore or update your iPhone, iTunes (or Finder) asks Apple, "Is it okay to install this iOS version?" Apple checks if that version is "signed." If yes, it issues a signature—the SHSH blob. i unable to request shsh 3utools fix better
"I am unable to request SHSH on 3uTools. Please help me find a better fix." Use blobsaver with "Set ApNonce" enabled, or use
When Apple issues a signature, it is tied to a random number called the ApNonce (Application Nonce). 3uTools sometimes requests a blob with a generic ApNonce, but later when you try to use that blob for a restore, your device generates a different ApNonce. The signature doesn't match. As a defensive measure, Apple's servers may reject 3uTools' request outright if the ApNonce format is incorrect. Think of them as a unique handshake between