iOS 9.9.15.3 (build 19D6050) is an official Apple over-the-air update for the iPhone X (GSM), released on 2022-01-26T18:14:13Z. The update package is 4.25 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: 4f956f2306b8fbe6da70adcd95d95d801256fb37.zip.