iOS 9.9.13.4.5 (build 17F5034c) is an official Apple over-the-air update for the iPhone X (Global), released on 2020-03-31T17:20:18Z. The update package is 3.15 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d0789a590beb1e83ec00adfaff610e1e1a1c4fd5.zip.