iOS 13.3.1 (build 17D5044a) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2020-01-14T18:21:00Z. The update package is 183.59 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ac4edba08b18d9e1c8b6a2754a46f1d358b76653.zip.