iOS 13.1 (build 17A5844a) is an official Apple over-the-air update for the iPhone X (GSM), released on 2019-09-18T17:06:57Z. The update package is 118.35 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: 72d3fcb1f36538e19ce031bebfd4ed9afb3bb86b.zip.