iOS 9.9.13.4 (build 17E255) is an official Apple over-the-air update for the iPhone X (GSM), released on 2020-03-18T17:22:00Z. The update package is 3.12 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: 7711fd964274e27357b7497cc53da3df6003bbfa.zip.