iOS 9.9.16.6 (build 20G75) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2023-07-24T17:29:48Z. The update package is 4.38 GB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ff5307eb5178bed45d6a50d7ad2c8bf8a35c5887.zip.