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Apple only issues signatures for the currently-available iOS version, which disallows installing older iOS versions. This signature is needed to restore a specific iOS version it is generated by Apple based on hardware keys of the device and the hash of the firmware. SHSH often also refers to backup files with this signature ("SHSH blobs"). Problems can arise when your hardware device is too old or not supported any longer.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. This will help if you installed an incorrect or mismatched driver. Try to set a system restore point before installing a device driver. It is highly recommended to always use the most recent driver version available.

Please make sure the you reboot your device after the update process is complete and check to see if you have the latest available iOS version. Instal this firmware and your device can benefit from improved system stability, network-related functions and performance, enhanced touch experience, various fixes for problems encountered throughout the device's usage time, as well as several other changes.īear in mind that, before you get this release, you must check to see if the available firmware is developed for your model and SKU (stock keeping unit) – if you apply an incompatible software, the device will encounter serious malfunctions and can even be rendered unusable. The IPSW files provide a very quick method for updating the software on your iOS device via iTunes. IOS (iPhone and iPod Firmware) is a collection of firmware update files (IPSWs) for Apple's popular iPod and iPhone devices. Wait for the iPhone / iPad / iPod to finish the process About iPhone / iPad / iPod Firmware: Select the IPSW file you downloaded to update / restore your deviceĤ. On Macs OPTION-click and on PCs SHIFT-click the Update / Restore button in iTunesģ. Connect your device to your Mac or PC using the connection cableĢ. Download the firmware to your hard driveĢ. How to update / restore your iPhone/iPad/iPod using the downloaded IPSW file:ġ.