from third-party archives, but you under normal circumstances . Apple stopped "signing" iOS 12.1 for the Go to product viewer dialog for this item. in December 2018. ⚠️ The Signing Problem
If you have a signed IPSW file and want to install it manually: iPhone 8 (GSM) IPSW Download - iClarified Download iOS 12.1 for iPhone 8 (GSM)
Since iOS 12.1 is blocked, you should install the latest supported version for the , which is . Over-the-Air (Easiest) Open Settings > General . Tap Software Update . Select Download and Install . Using a Computer (Manual IPSW) ⚠️ The Signing Problem If you have a
iTunes or Finder will block the installation of unsigned firmware. Select Download and Install
You can technically download the iOS 12.1 IPSW file for your iPhone 8 (GSM) Go to product viewer dialog for this item.
Apple uses a "signing" system to control which iOS versions can be installed. iOS 12.1 is currently unsigned.
You cannot downgrade from a newer version (like iOS 16) to 12.1. 📥 How to Download (Archive Only)