iOS 13.3.1 (build 17D5050a) is an official Apple over-the-air update for the iPhone X (Global), released on 2020-01-22T18:07:21Z. The update package is 196.86 MB. This is a delta (partial) update that requires 13.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 32826c227f8ad2671e91cc13b16cab473ef58d8b.zip.