An IPSW (iOS Software) file is a firmware file used by Apple devices. It contains the operating system and other software components needed to restore or update iOS devices like iPhones, iPads, and iPod touches.

You can download unsigned IPSW files from IPSWFile.com. IPSW File is the #1 trusted websites that archive these files. All the files shared on IPSWFile.com is are from Apple server, so it is 100% safe and secure to download and use files downloaded from IPSWFile.com

To install an IPSW file on an iPhone:

1. 1. Connect your iPhone to a computer with iTunes or Finder (macOS Catalina and later).
2. 2. Open iTunes or Finder and select your device.
3. 3. Hold the Shift key (Windows) or Option key (Mac) and click on 'Check for Update' or 'Restore iPhone.'
4. 4. Select the IPSW file you want to install.
5. 5. Follow the on-screen instructions to complete the process.

Installing an unsigned IPSW file is generally not possible on modern iOS devices due to Apple's security measures. Unsigned IPSW files are typically older versions of iOS that Apple no longer signs (authorizes for installation).

Unfortunately, it's not possible to restore an unsigned IPSW without SHSH blobs on modern iOS devices. SHSH blobs are unique signatures required for downgrading or restoring to a specific iOS version, and they need to be saved while Apple is still signing that version.

You can use iTunes or 3uTools to restore your device using an IPSW file. Simply download the correct IPSW file for your device, connect your device to your computer, and use iTunes or 3uTools to select and restore the firmware.