But, you can downgrade to an unsigned iOS using a specific third-party application. When you upgrade your iPhone to an IPSW firmware that is signed and contains SHSH blobs, then you will be unable to download any iOS firmware to downgrade without shsh blobs. Yes, you can downgrade to an unsigned iOS version using FutureRestore, SHSH blob, and corresponding unsigned iOS firmware. No, the SHSH are specific to the device they came from, so you can only use your own blobs. Can you save blobs for unsigned firmware? SHSH often also refers to backup files with this signature (SHSH blobs). SHSH, or Signed Hash refers to the signature (currently RSA) on boot images or APTickets that the device bootloader will verify before allowing execution of an image. Shsh2 blob files are unique to each device, meaning you cannot simply use the blobs of another device with your own, thats why we are doing the backup in the first place! What is SHSH on iPhone?įrom The iPhone Wiki. Is it possible to downgrade to an unsigned iOS version?Ĭan I use SHSH blobs from another iPhone?.How do I upgrade to a specific version of iOS?.Is it possible to upgrade to unsigned iOS?.Can you downgrade iPhone without blobs?.Is it possible to downgrade unsigned iOS?. ![]() How do I downgrade my iPhone using blobs?.Is it possible to downgrade to unsigned iOS?.Can you downgrade to unsigned iOS without blobs?.Can I save blobs for unsigned firmware?.How do I downgrade my iPhone using SHSH blobs?.Can you save blobs for unsigned firmware?.Can I use SHSH blobs from another iPhone?.
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