iOS 9.9.16.6.1 (build 20G81) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2023-09-07T18:00:00Z. The update package is 4.49 GB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4220c35353990ff20c733731b5176560b39e91dd.zip.