iOS 13.1 (build 17A5837a) is an official Apple over-the-air update for the iPhone XS Max, released on 2019-09-10T20:25:09Z. The update package is 271.99 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: 939fc14fa410ca3fbdf33bb1378e0df9e6eec098.zip.