iOS 13.1 (build 17A5837a) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2019-09-10T20:20:35Z. The update package is 247.26 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: 8278e555f09264dd997affba0eb0281c8162b98e.zip.