iOS 9.9.16.5 (build 20F66) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2023-05-18T17:13:51Z. The update package is 4.38 GB. This is a delta (partial) update that requires 12.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 713a1ab937a13b2f03f4c2d4b33d9eb16fcde8ed.zip.