iOS 13.1 (build 17A5831c) is an official Apple over-the-air update for the iPhone X (GSM), released on 2019-09-04T17:06:15Z. The update package is 267.43 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: fbbd8ed2d96cabe27709f89a971b82a5f5fd63b7.zip.