The company does that for security reasons and encourages iOS users to install the latest iOS update. Whenever Apple releases a new iOS update, it stops supporting the previous versions.
Basically, it is an old file format to downgrade your iOS. When we say unsigned IPSW, it means that it is a file format that Apple no longer supports. This method will help you understand how you can download and install unsigned IPSW. Method 2: Use SHSH2 Blob to Install IPSW FilesĪnother method to try is using SHSH2 Blobs. Install the IPSW, Fixcon will take about 3 minutes to finish this process. Then select the IPSW version you desired for downgrade or upgrade.
Connect your iPhone to computer, Fixcon will automatically detect your device.
Launch Fixcon and click on Advanced Repair.
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