iOS 13.1 (build 17A5831c) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2019-09-04T17:06:12Z. The update package is 513.46 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: 9294e7ab712c8c2ff574460391f8e1249489caae.zip.