iOS 13.1 (build 17A5837a) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2019-09-10T20:21:01Z. The update package is 380.22 MB. This is a delta (partial) update that requires 13.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3b536711c9db42330430d4083fde7546fe74ec7b.zip.