iOS 13.1 (build 17A5821e) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2019-08-27T17:29:11Z. The update package is 414.37 MB. This is a delta (partial) update that requires 13.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e355e17293f9769c4719ef97cfdb11912bb1dbd5.zip.