iOS 13.1 (build 17A5831c) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2019-09-04T17:06:09Z. The update package is 290.89 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: 9ac181f1cc44476eae5170813681a9a5d52cdce8.zip.