iOS 9.9.12.3 (build 16F5139e) is an official Apple over-the-air update for the iPhone X (GSM), released on 2019-04-22T17:08:52Z. The update package is 2.6 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: a35cfd4d55e4c4eb300c7db60232551c4b29257f.zip.