iOS 9.9.16.3 (build 20D47) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2023-01-23T18:48:47Z. The update package is 4.19 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: 2396f7aab12f8c207041352cf3e0f8413cbb7e99.zip.