Provide the following concisely:
Apple signs a new iOS version for only 1–3 weeks sometimes. The moment a new iOS drops, open 3uTools → Save SHSH → Save all available versions. Store these blobs on an external drive. 3utools Error Unable To Request Shsh
blobs are digital signatures created by Apple’s servers. Every time you restore or update an iPhone, iTunes or 3uTools sends a request to Apple's TSS (Time Stamping Authority) server. Apple checks the request and issues a unique SHSH blob for that specific device (identified by its ECID) and that specific iOS version. Provide the following concisely: Apple signs a new