iOS 13.1 (build 17A5831c) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2019-09-04T17:06:13Z. The update package is 290.92 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: 714d73a48384d96a3a2a027eb2bc5190913dea3e.zip.