iOS 12.3 (build 16F5139e) is an official Apple over-the-air update for the iPhone X (Global), released on 2019-04-22T17:08:49Z. The update package is 450.47 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9a6f89fe90dc40f55a365dc97d8bcdd4ef566963.zip.