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
You cannot downgrade from a newer version (like iOS 16) to 12.1. 📥 How to Download (Archive Only) Download iOS 12.1 for iPhone 8 (GSM)
If you have a signed IPSW file and want to install it manually: iPhone 8 (GSM) IPSW Download - iClarified ⚠️ The Signing Problem You cannot downgrade from
iTunes or Finder will block the installation of unsigned firmware. Since iOS 12
You can technically download the iOS 12.1 IPSW file for your iPhone 8 (GSM) Go to product viewer dialog for this item.
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)
Apple uses a "signing" system to control which iOS versions can be installed. iOS 12.1 is currently unsigned.