3uTools is a comprehensive iOS tool, currently supporting iOS9-9.0.2, iOS8-8.4, iOS7-7.1.2, iOS6-6.15, iOS5-5.11 and iOS4-4.3.5 untethered jailbreak...
This tutorial is majorly about how to backup SHSH blobs and upload the local SHSH blobs.
SHSH is the key to restoring, downgrading and upgrading iOS devices. The iPhone 4 with SHSH file backups can be downgraded to any compatible...